Epoxy Primer vs Self Etch Primer for Bare Metal

[@kutzbill]

One of my first jobs was to paint big I-beams that had been fabricated for buildings and bridge work. The first day, knowing nothing about paints, I was given an airless and told to paint the metal, which had been blasted. I did it, and at quitting time, the boss said I did a good job, and to be there earlier tomorrow as he had a lot more to paint. When I came in the next day, he asked me did I clean out the airless unit. I said no. He told me that I wasn't to blame as I told him I didn't know anything about paint. We had to replace the hose, but the pump and gun we soaked in lacquer thinner and it cleaned it out very well. He said he woke up about 2 am and thought about it, but figured if I didn't clean it, there was no one to blame but himself. I worked for that guy for 13 years, he was a great owner/boss.

[@carlcampbell6827]

kutzbill - Yea we have all had that experience of waking up in the middle of the night thinking about a mistake made on the job earlier in the day. Did you ever have to crawl up on erected structural steel work to paint?

[@bishopgarrett306]

i realize it's quite randomly asking but do anybody know of a good site to watch newly released tv shows online?

[@grantjesus9703]

@Bishop Garrett I would suggest Flixzone. You can find it on google :)

[@clayhendrix9010]

@Bishop Garrett Try Flixzone. You can find it by googling =)

[@greysonira4536]

@Bishop Garrett I use FlixZone. Just search on google for it :)

[@dandeac1907]

You made the most specific video about primers on you tube. Thank you and LIKE from me

[@CarAddictGarage]

Glad you found it useful. Thanks for watching. I have a full lesson on sanding, priming, blocking, etc you may also find useful at www.collisionblast.com/paint-prep/

[@lass-inangeles7564]

Analysis of Anti Rust Products Most rust converters and inhibitors which use Tannic Acid or Oxalic Acid, leave residues, and may use an acrylic polymer base which does not allow proper adhesion of epoxy paints. These brand names are Loctite Rust Neutralizer, Rustoleum Xtend, Eastwood Converter and Encapsulator. Ok for household use but will not allow proper adhesion of Epoxy finishes. However, Phosphoric Acid (PA) is both a rust converter and inhibitor in one. It chemically bonds rust to metal and also leaves a fine film that prevents further rust from forming. It also cleans white corrosion on aluminum and heat scale from milling, greasy finger prints, residues, dirt, etc leaving a primed surface ready for paint. It also allows welding and sanding over it, excellent adhesion of epoxy primer and paint. It does not allow epoxy filler to fill dents and scratches. You need to use Epoxy Primer over the PA and then do gap filling and sanding. You have these issues to deal with when refinishing cars in metal or fiberglass: 1. Rust neutralizing and inhibition. Chemically transform hidden rust and also prevent new rust. 2. Gap filling dents with epoxy filler. 3. Adhesion of epoxy primer and paint to the metal or fiberglass car body. 4. Anti-rust product must be be able to take sanding, welding, adhesion of epoxy primer and epoxy paint, leave no residue. 5. Need a product that removes finger prints, greasy residues, dirt, and leave a very clean surface primed for painting. 6. Need a product that you can apply to rusty metal and non rusty metal at the same time without adverse effects on either section. Cars have some rust spots but mostly not rusted. 7. Need a product that can remove aluminum white scale corrosion (from contact with air), and any heat scaling from milling. Many RVs have aluminum trim alongside fiberglass and iron/steel pieces. The only product that does all this - except gap filling with epoxy filler - is Phosphoric Acid. Cost is $25 per Quart or $50 per Gallon online. Compare this with Picklex 20 which is the same Phosphoric Acid. Cost is $60 per Quart or $195 per Gallon online. More than double for a brand name for same product. Beware the high priced brand names for ordinary products off the shelf. I would like to know the active ingredients of Self-Etching Primers. I am sure they are the same thing - Phosphoric Acid sold at inflated prices. It is important to note that you cannot compare Epoxy Primer with a Self Etching 'Primer'! Epoxy Primer: True Primer. This bonds to metal, fills some tiny dents from sandblastic or wire sanding. It has zero rust CONVERTING ability. It cannot convert rust to a harmless form of Iron Oxide 3 which is stable and non-rusting. It does not leave a film to prevent rust. It coats the metal and creates a good surface for the Epoxy Paint to adhere to. It also allows Epoxy filler putty if you want to even out some larger dents. Self Etch Primer - Most likely Phosphoric Acid. Cleans, etches, CONVERTS rust to a stable form of Iron Oxide 3, and cleans surface well to take Epoxy primer and paint. IT DOES NOT TAKE EPOXY FILLER FOR GAPS! Now if you want to pay higher prices buy this. If you are smart, buy Phosphoric Acid directly.

[@mikem5475]

So just shoot acid on the panel and let it sit?

[@david929190]

I'm attempting my first restoration and this video really helped me chose the first coat of paint on the bare metal!

[@theperson185]

What did you use and how has it held up?

[@david929190]

@@theperson185 I parted out the car and scrapped the shell. I suggest watching some Motion Auto or Junkyard Dave videos for what they use when painting. I think you can just use a sealer primer or epoxy primer over bare metal and filler before moving to high build.

[@theperson185]

@@david929190 I'm actually doing over a semi truck frame, so im just doing my research intowhat will stop rust and be durable and resistant to flexing

[@david929190]

@@theperson185 See Debos garage heavy duty and his frame re-spray on his cab over. Any decent epoxy primer should be fine. if you've blasted the frame. Etch primer would be best used for new metal that is too thin to abbraisevly prep for coating adhesion. In the oil and gas piping world all pipe is blasted to a white finish and then epoxy primed before topcoat. A rusty old frame won't need etch primer as the surface is not smooth.

[@trinidadhydrographicprinte4389]

Great discussion. I would say epoxy primer is better on steel as steel is so reactive. Otherwise etch primer is so much faster and easier to use on all other metals. I only use Sikkens etch wash primer though..

[@ilkzode1822]

Wanting to paint my kids bike. Handlebar looks like chrome mirror finish. If i wanted to paint it should i use self etch primer and so if , only need self etch prior to base coat

[@SoilentGr33n]

Very good video. I use Epoxy all the time and here's a few things to consider as well. I see your catalyst is nice and liquid, thinning down the final mix to a sprayable consistency. My epoxy catalyst is THICK. The ratio on the Nova 3000 I like to use is 4 parts epoxy and one part catalyst, after induction time the mix is THICK. I wouldn't even consider pouring that down my gun, it just won't shoot no matter how big a nozzle I use so I have to thin it down. Ask me how I know. Tip : When you buy epoxy, inquire how think the catalyst is. In order to shoot paint or anything with a gun it needs to be thin, almost like milk. So if the catalyst doesn't act as a thinner, you NEED TO BUY EPOXY THINNER, any all purpose thinner will not work, some will even sort of coagulate your epoxy after a few minutes and good luck cleaning that out of your gun, you need a specialized thinner. Personally I like to thin quite a lot and shoot out of a 1.8 nozzle on the HVLP gun. If you have to thin your epoxy primer, wait AFTER induction time. So you wait your 15 or so minutes, stir it up a bit and pour down the thinner until desired consistency. Second thing is that epoxy doesn't sand very well in my experience. Some primers sand better when completely dry (72+ hours) but breaking the surface of the primer with sand paper is annoying and can gum up the paper real fast.

[@Eattsie]

I agree Im rebuilding a 87 XF Ford Falcon, I had a bit of idea what im doing but these videos are SOOO helpful. Thanks alot

[@MatthewKrebs_BlackBrave8]

As I see others saying in the comments, this is the most comprehensive video on primers on youtube. Good job and thank you!!

[@johannriedlberger4390]

To mix small batches of epoxy I use 2 syringes. One is for the primer the other for the hardener. I use different sizes so they don't get used with the wrong product what might contaminate it. Then it is no problem to use them several times.

[@SP330Y]

@DIY Auto Body and Paint 2 years later to my last comment,i can reveal that i sprayed a metal drum BBQ in my back yard with both epoxy and etch primer in 2 seperate halves on the drum lid and 2 years later the etch primer wins,no rust coming through wheras the epoxy has rusted. The BBQ drum was left outside in all wetahers totally unprotected

[@CarAddictGarage]

Thanks for testing that. Primers do absorb moister. A top coat really needs to be applied on top to help prevent rust. Thanks for your feedback and letting me know results.

[@SP330Y]

DIY Auto Body and Paint you are right,yes i never put a top coat on at all :(,even though left outdoors the etch worked best for me as in the UK it always rains

[@metallmannschneider9856]

@@SP330Y ... same here. We also have better experiences with etching primer. Harsh winter conditions didn't do any damage to etch primed metal, where epoxy based primer failed and rust took over again (engine under tray).

[@SP330Y]

@@metallmannschneider9856 further to this i also did an experiment with ZINC paint (cold zing galvanised paint) a product called ZG90, an that has amazing results, when i scratched off the silver zinc paint, the metal underneath was like brand new, tht wasn't even top coated with any other paints, so for me the best 2 are etch primer and cold zinc galvanised paints

[@CarAddictGarage]

No, it is not recommended to put body filler over DTM. You should apply the body filer to direct metal. The only primer that filler can be applied on top of is epoxy. Thanks for watching.

[@metalmonster34]

Great video, Donnie. I use DTM for large areas and aerosol self-etch on small things also.

[@filitamayo]

Great video, you answered alot of my questions. Based on what materials to use over bare metal and body fillers. Thanks for sharing your knowledge with us.

[@CarAddictGarage]

If the paint is in good condition, you can final sand with 400 grit and paint on top of the sanded surface. Epoxy or self etch is for metal. So if you are not stripping, you can skip this step.

[@harveyvargas5732]

What is primer sealer used for?

[@CarAddictGarage]

Yes, this will change the color. The best advice is to spray several spray out cards to see what effects it has and see which ones you like. Some color chip books also show you what it will look like with different base colors. Ask your paint supplier if they have something like this.

[@jevchance]

Glad to see you getting back to the information vids Donnie. This has always been a hot topic, thanks for sharing your expertise on the matter.

[@yuvegotmale]

I have been putting epoxy primer on bare metal for 40 years...mostly PPG DP and then the newer DPLF. I had to learn the hard way, stripped a car to metal and applied lacquer primer surfacer...this was in the 70s. A year later it was flaking off. I like the ability to apply body fillers over it. I guess Iam old school....I have put some DTM product on bare steel but not sure how it will stand the test of time. Tried to locate the Shop Line product...that I think is a off shoot of PPG....cant get it locally....they tried to shove Omni off on me. You did a great job a explaining the the products...

[@CarAddictGarage]

Yes, you can use DTM on top of filler or metal.

[@Jeus-h3o]

That was a very informative video❤❤thank you

[@00asaenz]

I really like your teaching style. Thank you for sharing. I'm newb and getting ready to do my own fender flaring body work.

[@CarAddictGarage]

Thanks for watching!

[@menosabe]

Great video, OSHA says paint cabinets have to be self closing.

[@pedromiguelareias]

How do you clean the steel panels prior to applying epoxy? Do you use hydrochloric acid? Some people have mentioned corrosion breaking through epoxy. Naked hands are a no-no, but perhaps a acid application followed by water and degreaser would solve that issue. What do you think?

[@peterrivney552]

Wash and wipe or sand the metal for bondage with 120 or 180 grit sandpaper... Then do your bodywork then sand with 240 for final primer or high build primer then final sand with what is recommended for the paint you are using...

[@sweet1.662]

Great video thanks is it ok to put one coat of self 2k etch primer on then a couple of coats of epoxy on top of the self etch both panels I'm prepin have been no blasted back to bare metal I've only ever used self etch in past found it fantastic but I'd like to try epoxy on top of the self etch as a added bonus wat would you recon thanks

[@CarAddictGarage]

Thanks for watching and I am glad the videos help.

[@cozmo5709]

Awesome video man and very informative! I am clear coating a bare metal garden bench to keep that industrial look. I have bought 2k clear Matt to finish it off, if I use epoxy primer on the bare metal and then 2k clear over that, will it work nicely?

[@TomWest-ir5vq]

Hi is 2x Rust-Oleum® Professional Aluminum Primer Spray strong hold and good for aluminium

[@VicsGarage71]

Short simple and to the point! Great. Gives me the confidence to epoxy prime after dipping my car that I’m documenting on my channel

[@Jeffe46M]

Thank you for clearing this up for me. Self etching will do fine for what I am using it for.

[@Supanova70]

say i need to cover a welded seam and use kitty hair. Would the right procudure be scratch 36 or 80 then apply and level kitty hair,Epoxy car, then poly filler skim coat,high build primer? This is for the sail panel welds on a novas qtr panel. Thanks man.

[@INTIREMOBILETIRESHOP]

Hey Mr Smith. You are a blessing. I've learned a lot from you and I'm grateful. QQ: I paint just wheels. Curb rash and sometimes whole wheels. Is epoxy primer the only primer that I'll ever need? And is there a can primer that you'd recommend for quick spot repairs on wheels? Happy Easter and thanks in advance.

[@carlosvazques3276]

Great video!my question is how to prep the proxy for primer o what tipe o primer and when to apply?thanks

[@davidgillettuk9638]

Thanks, very helpful. Unfortunately there are many really pertinent questions asked here but no responses, that's very frustrating.

[@chrissherrill790]

I have a small aluminum gun part “back plate of Glock” I can’t get anything to stick … self etch scratches on it… any ideas?

[@joaquinrodriguez1355]

can you apply paint sealant over epoxy primer ? Also i'm kinda confused but after applying paint sealant can you leave it and paint over it?

[@CarAddictGarage]

There are a lot of different paint companies out there. If you want to do something like this I would look over all of the technical data sheets to make sure they are all compatible with each other. At the end of this video, there are two videos that you can click for Shoplines epoxy and self etch technical data sheets.

[@Shaft-Industries]

So if I am painting something like wheel hubs or anything that does not require fillers but just a top coat then self etching primer in a spray can would be a convenient way to go. Right? Like painting suspension parts or even the rear end housing with say Rustoleum self etching primer would be perfectly fine.

[@st-qd8wg]

I'm using steel wheels, and I was wondering if I can wet or dry sand self etching primer.

[@EEZYEEEE]

What degreaser do you recommend before using epoxy primer on bare metal that had all of the rust sanded down?

[@MA-cl7wz]

Thanks for your video, just wondering what kind of primer you use for rust protection ? I have used rust converter on rusted surface, then applied body filler, now I am wondering if I should use Etch/ Acid primer on top of body filler, or I can use Urethane primer as a sealer then apply paint on top of it? Appreciate your response on this. Thanks

[@matthewstorm5188]

If you just want to use a spray can, you can buy 2K epoxy primer in a spray can (ie Spraymax, Eastwood, etc.).

[@hekdarebel5922]

can you paint directly over the etching primer. or do I have to apply a surface primer

[@refekuk7]

I working on a beat up 92 Ford F250, finished body work on the hood and applied epoxy primer. Wouldn't you know it I missed a small ding, can I apply bondo directly over the epoxy? Also I intend to apply a high build primer, how long can the epoxy primer sit before applying the high build primer?

[@firpofutbol]

I have a flat sheet of metal that do not need perfection. Can you apply base coat over self etching primer thereby skipping the primer surfacer and the work to get everything perfectly flat?

[@mikem5475]

What did you find?

[@JiroProject]

I'm putting filler on self etch primer, should I be okay?

[@kevinkanzler6281]

I asked that question a little bit ago. Didnt get a good answer. This vid realy cleared things up

[@simonneve1100]

hey there i just cant understand why its not possible to apply body filler to etch primer? what happens when you do? is it just a question of "bad adhesion" or dose it react somehow with the etch primer? cos to me it sounds even worse to apply filler direct to metal since its a poros material and simply the moisture in the air would get trapped under the filler as well... in my mind you need to apply something that chemicaly merges with the metal ( like acid helps etch primer do ) or something that transports ANY moisture to the surface or otherwise away from the metal. good vids by the way this is not critic just woundering

[@CarAddictGarage]

No, I have not used there primers. There have been some people tell me that they like it.

[@CarAddictGarage]

Are they using epoxy as a sealer before painting? That will be fine, but if they are applying self etch, then epoxy, then primer surfacer....I don't know that there is a benefit. Unless there is a paint company that recommends that. I know with PPG or Shopline that is not necessary.

[@DILUSI]

your videos are great, im grad i came across your feeds, your really friendly & easy to listen to thanks for taking time out to make them.. i have a 68 fast back i need to do body work on and will try to use as much as your teaching to get her there ere

[@RD-fw8qy]

I've used body filler over old primer surfacers and other for years when you didn't have epoxy primer.

[@Choober65]

I use cold galv, etch primer, epoxy (2 coats) filler primer then base finally 2K clear. Ive never seen a panel rust after that, even after exposure to sea water.

[@mikem5475]

Epoxy primer over etch?

[@jimbolee72]

You dont worry about any sanding on your coat of etch or epoxy. Spray your high build primer after, then do your sanding on it..

[@19rocket53]

I sand my hood down to bare metal, and I did some body filler work on it directly to metal. Now , do I need to use self etching primer and also a top coat of other top primer.? I cant find poxy prime around the area where I live. Thanks! Great video

[@VWPassat_3BG]

Which one you think is the best for Aluminium and which is which is the most resistant heat. Im trying to paint my car engine gearbox and i confused what is the best for last long. Thanks and nice explanation.

[@W333dm4n]

got some $10 rustoleum self etching primer at home depot. wish me luck

[@kittkatt032]

Slava Basat Oh really? Im wanting to paint my shiney chrome bath fixtures. Wonder if this will work.

[@valdovic5370]

Can I use epoxy primer without catalyst? I buy primer together with catalyst, but one day later I found out my catalyst is harder than wood. Maybe because the container was plastic that sales man transfer to it.

[@CarAddictGarage]

I answered your question in this Q&A video. I hope you find it useful. kzbin.info/www/bejne/m3Lbd3mDrLhqa5Y

[@smeckenjacksson7732]

Can you put rust converter and then epoxy? Just to be 100% that small rust spots on the chassie is protected

[@bluelinebuild6807]

really hoping someone, maybe even Donnie can answer this for me as I cant seem to find anything on my specific situation. I have sanded down the factory paint using 180 grit sandpaper and have taken care of the bondo/bodywork (taking those areas down to bare metal before applying bodyfiller). Small areas throughout the body work have been sanded down to bare metal. I was told by my epoxy primer/sealer manufacturer to reduce the epoxy and spray it as a sealer but It may take me awhile to be able to fully spray those panels due to cold temps here still. So my question is can I use rattle can self etch on those bare metal spots and shoot the epoxy sealer directly over that and the rest of my scuffed original paint or will there be problems?. I keep reading not to shoot epoxy over self etch. Any help from anyone would be greatly appreciated.

[@Supanova70]

Great video. Say you missed the window to apply 2k primer. Do you use a maroon scotchbrite to prep surface for the 2k? what sand paper would be a good choice if not?

[@CarAddictGarage]

I created a video that I hope helps answer your question - kzbin.info/www/bejne/faWZY2d7bZhjqck

[@rashpalsingh1029]

I am Restoring a classic Peugeot 404. It’s in the body shop now. Must I go to bare metal on the whole car to get a show car finish?

[@btbd2785]

I know this is an older video. Question regarding DTM. Direct to metal. Since this is a primer surface it also has a Self etching primer. Now since this is a self etching primer you cannot use it with body filler that may need to go over it??? I belive the make this in a 1K and a 2K, eirherway. My other question is this. Is s High Build primer the same as a High Build Primer Surfacer? Also, is a Rapid Primer Filler the same as a High Build Primer or High Build Primer Surfacer? Last question. I have a Black Metalic color on my vehicle. Would it be best to use a Black Primer and if they make it a Black Highbuild Primer Surfacer? Can you mix the color of primers? Sorry for all of the questions, I am very new to automotive paint but I really want to learn all I can to do the best job!!

[@CarAddictGarage]

The only primer recommended by many paint manufactures for applying body filler on top is epoxy. Yes, high build primer is a surfacer. And yes, a black primer would be best for black base coat.

[@btbd2785]

@@CarAddictGarage So the highbuild primer would then go on top of the epoxy primer and or body filler to act as a seal or is a sealer? I don't have a paint gun so will be using spray cans. I am looking at Spray Max's system of primers, sealer, paint system. There atomization process from what I have heard and actual people who use and it's very good. Apparently, they advertise there spray can system has equal or better atomization and equal or better spray pattern than an actual spray gun. None, the less I will be working on the inside lower surface of the right front passenger door, there is some surface rust. I will be investing in a spray gun. The compressor I have is A 1.8 HP 20 gallon 150 P.S.I. VFM rating is 5 CFM AT 90PSI and 6 at 40 PSI. Because of this my options are limited. So far I am looking at the IWATA LPH-80-124 with 1.2 tip. Can you make some recommendations?

[@btbd2785]

@@CarAddictGarage In regards to the filler. Let's say I have to apply some small gold filler because of some small rust pits thst are in the bare metal. I have been told to lay down epoxy primer first them add any filler then add more epoxy primer and then on top of that a highbuild primer , then base then clear. I also Bern told to add filler first then epoxy primer then highbuild primer etc.. So can you tell me which of these 2 examples I should use?? FYI. I was also told to use the color Grey abd not black because it's easier to see how everything that gets laid on top of that?? Thanks again

[@Henryb869]

Thanks for breaking it down so perfectly, im a beginner and still have lots to learn, i do have 1 question tho, should the epoxy be sanded before applying surfacer?

[@LEO-xo9cz]

I've made a piece of furniture with Aluminium trim. I just want to protect the edge whilst keeping the colour would one of these work? It's 5mm x 500mm. It's a floor lamp so it won't get much abuse.

[@paulperez509]

what brand of epoxy primer is good or is it all the same thanks

[@robertkinney1480]

Does epoxy primer have to be sanded before 2k primer goes over

[@davidparker9676]

Epoxy has a "window" when you don't need to sand it before priming or topcoating. The window can be as little as 24hrs to 10 days depending on the product. Check the technical data sheet for manufacturer recommendations.

[@fredcdobbs823]

State there's three options: epoxy, self-etching, & DTM. How does the primer-surfacer & sealer apply to priming?

[@terrydottin6495]

Interesting. Can a spray gun be use to apply this first coat on the metal

[@wjohnson1161]

sanded down some indoor hand railing down to the metal, someone told me to use etching primer over other primer because the paint will adhere better on the etching primer, the railing gets used alot on a daily basis. Other people told me it don't make a difference what type of primer, any info would be very helpful

[@CarAddictGarage]

I usually put body filler directly to the metal, then apply epoxy or self etch to any metal.

[@Romif_SK]

Hi. Can I spray etch primer over filler ?

[@nathanielswan909]

Can DTM be used with bare aluminum? I have a water fountain I want to prime and paint the area under the water. Can I use epoxy primer and then use epoxy with some color for a nice effect?

[@joegarza43]

What would be best recommended for aluminum...? Epoxy or self etching...? Thanks..

[@CarAddictGarage]

If you're doing a complete panel I prefer epoxy.

[@peteshelby21]

Thanks Donnie. Kept it simple and not confusing that everyone else does

[@CarAddictGarage]

Thanks for your nice comment!

[@alaneandreh2370]

One question which is better way put epoxy primer first at the metal before put filler or after put the filler and sand it all area repair with plastic filler then put epoxy primer on the filler and metal and after dry put primer ????????

[@DaleCarterDrives]

First, thanks for what looks like a pretty great video for us noob DIY guys. My question is about mixing ratios around the 5:50 mark. You said the ratio is 2:1, but you seem to point out 2 parts primer and 2 parts catalyst, which is 1:1. I'm going to assume that was a "brain fart" and the ratio was 2:1. Again, thanks for a plain English and simple guide video.

[@CarAddictGarage]

Yes, it is 2 to 1. This style of mixing cup does the math for you. If you are under the 2:1 of the mixing cup, you will go 1 to 1 or 2 to 2. Only on these cups. If that is confusing, just use ounces. 2 oz primer to 1 oz catalyst...6 oz primer to 3 oz catalyst. So basically just add half the amoung of catalyst for the amount of primer.

[@nuclearbum9858]

thats where i get confused i have some clean metal spots and black rust spots also...after wax and grease remover what should be done to the bare metal...should it be prepped or just hit it with epoxy

[@HomemadeAdventure]

Can you tell us a bit more about the DTM primer/sealer? I have a can of it. Also, I checked the can and the documentation and there's no window specified. Any reasonable estimates? It says I can sand after 50 minutes, but it may take a few days before I can topcoat.

[@electricsuncafe]

if im building a caravan sort of construction, with spray foam being applied to sheet aluminium, what would be the best way to prime?

[@paulperez509]

I'm one of use por-15 for my undercarriage do I need primer or can I just put it on that way by itself and maybe later spray over it thank you again

[@andrewhudson3723]

I use POR15 as a primer on rusty spots before putting on filler. It is epoxy based and is sensitive to sun. You have to paint over it.

[@freebusinees5668]

What is the difference between wish primer and etch primer Good

[@Rizzycat1]

Can you add them both over a phosphoric acid prepped surface

[@Rizzycat1]

Yes I believe that is fine. I asked Eastman yesterday concerning their spray-can version of epoxy primer.. good for 4 days after activating the bottom mixer plunger.

[@millermatic140]

Newbie question here... I bought 5star #5451 highbuild 2k primer and realized I may hit some metal seeing that prior owner used mystery paint and looks like he hand rolled the paint on haha. I’ve seen the prices of some etching primers and I’ve seen some $20 SEM or Upol aerosal self etching primers. Can I use aerosal self etching primer on exposed metal and then spray my urethane primer? Will it react and mess everything up?

[@themountainraven]

your explanations are pretty thorough, I feel I could do a proper job with the info you have. thanks.

[@CarAddictGarage]

Thanks for watching!

[@fredjones5327]

Thanks brother great video as usual, my issue is I have a small area where I sanded through you told me to use etch primer, then primer surfacer, then block with a 320... every time I block with 320 it takes the primer surfacer and etch primer off again... I used 3 coats of primer surfacer and a light coat of etched primer. I do have epoxy primer (beige color) should I try that over the bare metal then primer surfacer then block with 320 to see if I get a different result?? This is new to me and I’m NOT giving up help me please

[@CarAddictGarage]

Fred, here is a video response for your question. kzbin.info/www/bejne/f2XQoGZjlqqgfas

[@fredjones5327]

Car Addict Garage thanks big brother amazing as usual!!!!!

[@jz4958]

So whats the difference between a 2k primer and Epoxy primer? It's a bit of confusion.

[@CarAddictGarage]

DTM works good too! However, it is not recommenced to apply body filler over DTM.

[@NHC642]

What about DTM over body filler?

[@filthyphill100]

Thanks,I meant the primer. I ask the paint suppliers but they are only salesmen,and spray painters do not want to give away trade secrets.

[@edwardprete]

On a surface that has rusted and been blasted or DA’d how should the metal be handled and cleaned to ensure adhesion of the primer? And what kind of window?

[@Capachomexico]

Can you wet sand self etch primer if you used it in a circular area of just about one inch long? or just sand it with with no water?

[@KeithFeickert]

Technical Noob Question: What about both? I noticed you stressed the word "OR" when talking about self-etch and epoxy, but can you put self-etch down and then epoxy over it for like super-awesome corrosion control? Please excuse my naivete, I really don't know what I am doing and thought I would ask. Thank you for your time and pointers.

[@CarAddictGarage]

+Keith Kie You could, but both provide good corrosion protection. I don't know if both together would really provide more corrosion protection or not. I prefer epoxy, but that is just a personal preference. Hope that helps, thanks for watching.

[@AustrianAnarchy]

+Keith Kie Theoretically, the only one that is providing corrosion control is the layer in contact with the metal.

[@jabunchler5178]

After applying phosphourus to bare metal do I sand the phosphorus off then apply epoxy primer or just apply epoxy over the proposed?

[@brianfrancis2862]

will epoxy primer go over old prime that been sanded

[@Rd-kj1xk]

Hey Donnie! Can i apply epoxy resin or epoxy adhesive on top of self etching primer? Or should i apply a barrier primer between the etch primer and my epoxy glue? Thank a lot!

[@livedeliciously]

The TDS for Shopline epoxy says epoxy cannot be applied over self etch. I wouldn't do it regardless of what your product line is.

[@Wondergirl52]

I have slivers of bare metal that need to etch primed that are enclosed by sanded basecoat. Can I get etch overspray onto the sanded basecoat without negative effects? If not, how would I go about prepping these areas?

[@218422100]

I want to paint a Brass HO scale steam locomotive and was going to use self etching primer for it. I won't be using any filler or anything but was wondering if this is overkill?

[@CarAddictGarage]

You got me on this one...I read through several technical data sheets and they said nothing about applying self etch on brass. They all say steel, galvanized steel, and aluminum. It may work, but I can't say for sure. Sorry I can't answer this one, but I do appreciate you watching.

[@njturbo]

you mention the 72 hr window . If I use this to prevent rust on bare metal , do I just need to lightly scuff the panel to work on top of epoxy at a later date ? great video answered a lot of questions I had asked in the past.

[@evinx4429]

If i cleaned magnesium properly could i use 2k epoxy on it and not worry about it lifting off from escaping gasses getting though the magnesium/ aluminium?

[@liambyrne591]

What is the difference between etched primer and self etching primer?

[@mercedesmaintenance.6339]

Does seam sealer go on before or after the epoxy primer? Thank you for the explanation of the various primer options. It can be a bit confusing.

[@anthonymaniz1933]

Did you get a answer

[@mercedesmaintenance.6339]

@@anthonymaniz1933 Yes. Thank you for asking. Cheers 🍻

[@anthonymaniz1933]

I'm down to bare metal should I do seem sealer first.next question should I etch prime or epoxy prime first before body work I'm doing a Chevelle thank you

[@Yuaaaur]

Do i still need to add thinner when mixing the epoxy primer?

[@CarAddictGarage]

This may depend on the specific brand you are using. Or if you are spraying it as a sealer. If you need it to flow out better, than a little acetone or reducer may be needed. Ask your paint supplier for the specific primer you are using.

[@aaronfuksa2047]

what about galvanized metal? no oil primer on galvy but perhaps epoxy or etching primer is fine?