Making Boat GelCoat Look Good!

[@BornAgainBoating]

Suggest Topics That You Would Like For Us To Cover On Technician's Tuesday! www.bornagainboating.com/technicians-tuesday/

[@lesterclaypool1]

hey buddy i hate to see a guy work hard , when a couple small tips might really help ,, ok heres a great one that helps things look tiddy and neet ,,, ok all things that are to be covered in fiber glass should have rounded edges ,, it helps stop air pockets , and bond to the greater surface area ,, inside 90 degree are ok ,, but any out facing edge should be rounded ,,, the other great tip is to use mylar or thin hard plastic sheet you can put between you the the uncured fiber glass ,, you can see where you need to roll it and get air out from under it ,,, it works great and the glass sets up under it just fine ,,, hope these help buddy have a good day

[@rickstclair1425]

@@lesterclaypool1 +++++

[@tomharrell1954]

Spraying Gelcoat

[@adamdemirs3466]

I am rebuilding my baja ski boat and would like the step by step on how to fiberglass the new coosa into the existing boat with structural integrity. Also would like the best path to a good finish. This is my first time to restore my boat and there are a bunch of different suggestions out there on what I am trying to do.

[@Jameswrightdavid]

I second spraying gelcoat. Also, installing scuppers could be a good one!

[@eirikbirkedal2949]

Awesome job. I am 60 and had boats since i was 14. Allso work as boatbuilder from age 25 to 27. Great job. From Norway😊

[@BornAgainBoating]

Awesome! Thank you!

[@traviswonderling2021]

I like to apply a coat or two of gel coat directly over the glass after lay up. It will act as a guide coat exposing the highs and lows after sanding. Using release fabric is a good trick too. Lay up your glass and carefully apply release fabric over the area as soon as you finish lay up. Smooth out with a fiberglass roller or plastic spread. Once cured release fabric peels right off leaving a smooth surface.

[@279memiller]

Plus it works as a primer coat so you don't get the pin holes in your final coat. Use fairing compound over that after you sand it down and then finish gelcoat.

[@mescalp]

Can you tell me where to buy this "release fabric" thanks in advance.

[@279memiller]

@@mescalp I get all my fiberglass supplies from FiberLay

[@279memiller]

@@mescalp the fabric is called peel ply, I typically like the blue variety. Takes a ton of sanding time off of the project

[@mescalp]

@@279memiller Thank you Mike

[@MichaelSmith-cs8lc]

Excellent craftsmanship, am impressed! With this info can fix my boat. Wish had money to hire u guys.very thankful for all!

[@BornAgainBoating]

Our pleasure!

[@ericmastry7651]

Damn man you've been busting your ass working on this boat hopefully they are paying you well for this project. Keep up the good work I truly enjoy watching and learning from your videos!

[@CptAJbanned]

A few million views probably pays for it =P

[@hwwelds9050]

I like the Total Boat fairing compound. I think you should rebuild the boxes in the corners. You could really add to the structural integrity of the transom by using the boxes (and lots of fiberglass) to strengthen the transom. Especially if you are going to put a big hp motor on the boat.

[@andrewfyakim525]

Another great video! Thank you.... I've not had good luck with Bondo over the years; but then I haven't used any since the 1970's, on trucks, and I'll bet they have improved it since then.... You must have very strong knees. If I spend even a minute working on my old knees, I can't walk the next day!

[@brocluno01]

Nice project and well done. I developed a sensitivity to polyester after many years of boat work. No more for me. Now it's all epoxy, which I like a lot more as it cleans up with alcohol, and is easier on the skin and lungs. My Mom had a business making Xmas ornaments out of polyester resin. Late in life she developed COPD. I just walked away at the first signs of sensitivity, and have never looked back :)

[@williambranham6249]

Good advice. After many years using small amounts of Super Glue in woodworking I developed a respiratory sensitivity to the fumes. My first episode put me in bed with severe coughing, etc. It took two days to recover. Protect skin, eyes and lungs from organic solvents.

[@vincecappello2202]

Total boats total fair is a great fairing compound. Sands nice and it’s pretty cheap. Just a suggestion for future projects. Keep up the good work. I’m restoring a 31 Bertram

[@kirkmartin2223]

Total fair is awesome! I'm restoring a 22' falcon and have used it to fill holes up to .5". I don't know why anyone would put in all the work of installing a complete transom just to cover it up with bondo...smh

[@vincecappello2202]

Kirk Martin I don’t think he’ll have an issue if it is done correctly I’ve heard of a lot of guys using it. Me personally I’d just spend the extra money for the peace of mind. To each their own

[@WARweezy]

Since this is just for looks, I recommend adding microballoons to the bondo which will reduce the weight significantly.

[@boominS10]

I do whats called Rondo or a Bondo Milkshake. Its mixing equal parts of bonds with fiberglass resin to thin out the bonds. You use the harder for the bondo. Its easy to spread and will be water proof. We do this after all the fiberglass has been laid down to smooth it out and make for a very nice finished product for painting

[@everroarr]

you know bondo has several waterproof filler options like bondo glass and resin jelly as well as many other brands with similar products they would definitely be a better option with almost identical steps. although as you said as long as it is well sealed it shouldn't be an issue.

[@dustin9035]

That grinder looks dangerous AF, awesome!

[@tidemayne5834]

I can not believe you used bondo!!!! Lol you need to get you some awl grip fairing mud for a job that big my friend. Other than that, I love your work bro. Keep them coming

[@j.thomas7128]

I wish these videos were around when I was 14 and painting my late 60's early 70's Chrysler Boat with rattle-cans. I learned something else from KZbin today; the 115hp Chrysler boat was called a Conqueror. Perfect name for the model. It Conquered my lawn mowing and paper rot money.

[@112223alex]

Next time do the ferring with gelcoat and cabosil mix them together till you you get the consistency you want. Much stronger and better material you'll like the finish.

[@chrislangdell117]

I use Cabosil and fumed silica mixed together.

[@billwallenstein3387]

So here we are 2 years later. How is the bondo holding up? Are there any surface cracks? Is the gel coat cracking? I’m betting it’s holding up fine. I used it to fair all the old rub rail holes and crazing cracks in the gel coat of the top cap of a 73’ Sea Craft I redid about 7 years ago. I painted the boat with a quality top coat It held up fine.

[@osbornebay944]

Love your working skills and sharing with us, the greenhorns.....

[@nymack66]

I use Marine Bondo all the time for below and above the water line with no issues for the past 12 plus years.

[@pol4466]

My transon have a hole screw below water line. Can use bando bro

[@nymack66]

@@pol4466 Absoutly, make sure it is a Marine Grade Bondo

[@fakevirus8828]

Marine bondo is fine for filling as long as its not a small flexible boat. For the extra 2 mins effort I don't understand why folk don't use epoxy. I suspect its because they hate sanding it bit there are loads of disc that work well with epoxy, I've even got the little 3" mirka gold sanding pads for my smaller D/A sander and the 80 grit cut through epoxy no sweat and no clogging as long as my speed setting is bob on and I rasp them clean every 30sec with a normal 80grit

[@1Thatstrangeguy]

The neighbors keep wondering why they feel itchy all the time.

[@breakingbolts8871]

best comment

[@maikutsukino4743]

In a boat that size and in rough water, wouldn't that bondo crack when the hull flexes in the waves?

[@crforfreedom7407]

If you do that much in the future, try mixing it on a hawk and applying with a trowel instead of a knife and see if you like that better, especially on the back of the transom. I think it might be faster and more controllable for you. Just a thought... Something to try...

[@robmitchell3633]

Porter cable makes a electric powered DA sander that is awesome! Had one for years. Works great for fairing.

[@truckerdaddy-akajohninqueb4793]

I rolled on my gelcoat, sanded and applied finishing plastic bondo from NAPA before I begin building up my gelcoat. Spraying is ok if you have the tools and the compressor capacity

[@angeloc3842]

Bondo makes a marine product. Comes out of the can green. Works well & super easy to use.

[@luisfred4610]

Love it, my man is busting his ass with this boat, hope to see it in the water soon, that's the rewarding part and make all worth

[@djraymo]

We never use bondo in the Netherlands we make it smooth with the fiber glas then sand it and gelcoat it never use fillers its for amateurs and weaken the gell coat layer

[@alexbonjour7950]

Was very sad to see bondo over the nice lay up work. Was surprised that you didn't opt for a short strand filler or even filler with milled glass may have only added an extra 100$ to materials

[@d2nim2l]

$100 extra in materials, and for what reason? Why use Bondo glass or milled glass filler?

[@Kothas01]

It's polyester body filler not clay based old school "Bondo." It works so well a thin coat can seal anything as long as it isn't damaged.

[@oldmate9841]

That whirlybird thing on a grinder looks like a limb chopping death machine!😳

[@buyamerican3191]

The secret with fillers on boats is the presence or lack of talc. Any of the plastic fillers are semi adequate for fairing fiberglass but if they have talc in them they will attract moisture. I have always used 3M premium filler which of course has no talc and is recommended for use above and below the water line. There ore others and this is one of the most expensive fillers out there but also one of the finest. Most fillers are polyester based which is the main ingredient in most fiberglass lay-ups. I can hear the screaming already but epoxy has no place in polyester repairs, it's too stiff and too expensive. I have used hundreds of gallons of talc-free polyester filler over the past 40 years and am proud to say that I have NEVER had a failure of any kind related to the product itself.

[@fakevirus8828]

3M filler is junk too. Mix your own epoxy filler or accept the fact you bodged it. There are no good marine fillers, not one.

[@buyamerican3191]

@@fakevirus8828 that statement is false, there are good ones just not very many. You have to research carefully.

[@tazblink]

Not sure if I missed it but why bondo? Is it cheaper or easier to work with then the normal fiberglass fairing? Just wondering why you would use it instead of the better glass fairing. Thanks for sharing this video.

[@beppogiglio]

never use short pants when working with grp

[@mudlakemicrobes]

The watery stuff in the hardener tube is called prebondo.

[@mrcrabass3669]

Yes i spent hours sanding and then more sanding ,yours is looking good,love the vidoes,keep up the good work

[@risto124]

As much as i know, gel goat needs to be covered with plastic film to cure. What you can spray on and just leave to harden, is top coat.

[@prohen3049]

You only have to cover gelcoat if it doesn't have wax in it.

[@acehguy]

@@prohen3049 👍 yes add wax to last mix up then the gelcoat cures in its own environment .wax in styrene

[@zgambler1]

Great video one trick is extending the mud a little further it feathers in better

[@kirkmartin2223]

I just gotta know why you HAD to use bondo? I honestly can't think of a reason why you are using west system fillers which are some of the most expensive and then switching over to bondo to finish the project off. You did such a good job on everything else!

[@wayneericksen5374]

Why not use Totalboat Fairing Compound?

[@kirkmartin2223]

@@wayneericksen5374 total boat fairing compound is some awesome stuff!

[@vmonroig21]

I used dura glass on the outside hull with good result after year still there lol

[@ShoppingForDollars]

Amazing video... I can't wait to apply your suggestions when I refinish my 16' Boston Whaler. Thanks.

[@hankschrader149]

Mixed some of this up about a month ago outside temp was too hot and i put waaay too much hardner in it man did it kick off fast! 😂 So damn glad it's technicians Tuesday!

[@stevepiacenza2426]

Awesome video,thanks for the tips,I just began doing a transom and floor on my sixties starcraft starchief tin banger.

[@BornAgainBoating]

Good luck!

[@nicholasr7987]

I'm going to use drywall mud.

[@jacksbackable]

Nicholas Russell really......🤣

[@brody5563]

Dont forget to tape and use corner bead. Or else.....

[@soulsaucegoodwin319]

😂😂😂

[@mlfusion2533]

Looks great, love the videos!! I probably would have used Duraglass vs. the plastic filler. Not easy though. The Whirlybird is insane 😁

[@gregkemp473]

I have worked with polyester fiberglass before and the MEKP hardener is some very bad stuff. If you get a splash and it gets in your eyes, you have 2 seconds to rinse it out before you lose your sight. wear your PPE

[@Dutcharmytent]

Subscribed in the first 30 seconds

[@kranson8514]

Really coming along nice job👍👏👏

[@61spindrift]

I would like to add or assume you are not financially broke enough you can not go out and buy a sander that has dust collection and a vacuum. Take the leap and get set up with them it will be one of your best purchases.

[@t.koogle5283]

I really enjoy your work and it is all top level. However, you can see there are many (including myself) that are concerned about the use of Bondo on a boat especially below the waterline. Can you do a follow up on how well the Bondo holds up over time & use?

[@BornAgainBoating]

Thank you for all your support! We plan on making a video after we get done with the boat and use it for awhile :)

[@niceview2112]

Pretty cool fiberglass fishing boat here! kzbin.info/www/bejne/mKC3m6dtYsmpgpI

[@spanishjo4282]

I award you the best charismatic stylish boat rebuilder 2021

[@Cwilloughby01]

Work on getting affiliate links to the tools and consumables you use. This will make you money and help the viewers get the right products! For people restoring boats your channel is one of the top 3 people use.

[@BornAgainBoating]

Thank you! I've been trying to work on getting the affiliate game up and going. It's hard to connect all the different companies and products and now Amazon is basically cutting their affiliate program down. So well see what the future brings! Thank you for the motivation!

[@Fireship1]

Hey, love your channel. Have a question. Will the bondo be prone to cracking or crazing from the impacts a boat receives with normal use?

[@thomasharder9582]

It would be far easier to handle bondo if you used the larger sized rectangular taping pan (3" x 15" x 3" deep). I used to do taping in very high valued homes. Just an FYI, I'd have filled one pan and worked from left to right then right to left starting from the top. I would use two taping benches (you can set the heights perfectly for you) that allow you to easily move all the way across and up or down. Then, I would use an entirely different 12 inch knife. They're actually carried at inexpensive home stores. Maybe $15 bucks or so. The handle is attached to an "L" bracket and the knife edge is 12" x 3" and they are stiff. It allows room for your knuckles so you can flatten the knife more on your final smoothing passes. Depending on how thick you wanted it, based on watching this video, one pan would do maybe 2-2 1/2 passes, then you'd have to make more. Better yet, having a helper mixing bondo would allow you to keep working. Not to make fun, but someone who knows how to use a knife would take roughly 10-20 minutes to completely cover and smooth the outer transom (with a mixing helper). Plus, it would be dead smooth and almost perfectly flat. Believe it, or not, those inside corners on the inside of the boat would take longer to get dead smooth and perfectly square and flat. I'd use a good quality 6" knife (sorry but not what you were using) from Hyde or Wallboard. I guess what I'm saying, it's the knife you're using that's slowing you down and making it more difficult. Oh, every time you load the knife you'd clip some off the bottom edges of the knife so the mud/bondo would not easily slide out around the knife falling to the ground. Pressure must be very hard. I'm only writing this just in case you have any future similar jobs. Based on the quality of your work, you might hear from a lot of people looking to hire you. Really, a fantastic job! I do have a question though, why didn't you wrap at least a couple of layers of fiberglass around the corners on to the mating surface? (You'd have to grind down the mating edge to receive it.)

[@BornAgainBoating]

Thank you! Having a helper would be great lol maybe someday :) I don't mess with the corners just because it would get lumpy and then on the bottom of the hull that bump would be a pushing the bow down!

[@dennisstafford7801]

Well done, did you consider using marine grade bondo?

[@thehappytexan]

It takes guts to post a video of yourself doing things you know your not super experienced in. I respect any man that knows the limitations of his experience, but is confident enough to learn new skills. That was rare in the career I come from.

[@surviving.not.thriving1061]

This makes me wanna work on boats for a living for some reason

[@williambranham6249]

Lesson 1: Protect your eyes and ears and the big one the lungs at all cost. Organic products can be deadly.

[@phishertube]

Love the video and agree with all procedures with the exception of Bondo, i use resin mixed with micro balloons, or wood dust filler, then i sand immediately after it kicks, otherwise its like sanding concrete. Keep posting, great informative videos.

[@OfficerDave78]

Awesome ! Coming along nicely!

[@passionworksbodyshop9738]

Get a "bondo hog". Works as well as grinder plate trick and isn't dangerous.

[@thecapturban]

If you mix bondo with resin really well then add the hardener bondo becomes flexable

[@tomharrell1954]

Flexible bondo is a sign that something went wrong according to the manufacturer sheet.

[@thecapturban]

@@tomharrell1954 after years of customizing trucks, speaker boxes, bagged and juiced trucks, I can tell ya don't follow the dang directions. Fiberglass and fiberglass resin is designed to be strong and un pliable. Bon do is mean to do something similar but you wind up sanding 90% of it back off🤔 after lots of experimenting mixing bon do and just resin until you get the consistency desires then add the hardener, you can actually spread it out on wax paper and make it 1/8 inch thick, let it setup, peel it off and you will be able to bend it around and touch itself without it snapping, which would happen if it was one of the other. I think the bon do kind of works like the dust, but doesn't react like the dust. But for things that must have some give or flex, this WILL work, and can be added to an already fiberglass project. All I can say is experiment, may work for you, maybe not. Let me know if it does

[@tomharrell1954]

thecapturban It will never work for me. I do not use Bondo on any boats. It absorbs water therefore useless for boats. I was watching this video in hopes he keeps up with this boat. His hard and beautiful work I think, my opinion, will be a waste. The Bondo will absorb water, crack and delaminate. Bondo has a bad reputation to begin with. It certainly does not need any more to help it down the tubes.

[@boatpaintingrestorationwit3029]

Trial and error is the key👌

[@morpheusdesigns3604]

Can't believe they let that dust blow everywhere

[@hv9356]

Hmm This looks like rolling the dice to me. There are so many good fairing compounds out there... Well, we shall see what happens, maybe the repair is so strong it will keep the flexing to a minimum...

[@growlith6969]

I guess it's safe to say this boat is what we call in the car world a "beater". Because it doesn't have to be perfect, it just has to work, and you fix it with whatever you have, and most importantly, you get to not care a whole lot about abusing the hell out of it. Which, in a way, will make you love your ugly beater more than a perfect example, because you spend more time enjoying what you are doing instead of stressing over your shiny object.

[@geoffstein3896]

How well does a gravity feed spray gun lay down gelcoat? I was told they are not much good for gelcoat spraying but your job looked quite good. Thanks

[@jonm.7982]

Do you have to clean the gun after each "batch?"

[@Jameswrightdavid]

I'm I right in saying TotalBoat TotalFair Epoxy Fairing Compound is the same process as this but with marine grade filler?

[@pattihall8346]

Featherlite body filler is made with polyester resin, people complain but in the end only bondo is solid and remains and all wood is rotten.

[@lovinhouse374]

I am exhausted just watching the work you put into it lol. Doing a great job and enjoying watching the vids! Learning quite a bit! 👍🏻

[@efrainberrios8494]

Great work!!!

[@tonytran4857]

Love your work

[@BornAgainBoating]

Thank you so much 😀

[@handy1434]

Did you have to thinned the gel coat to go through he gun , what size spray gun tip did you use ?

[@raulthepig5821]

Why not use thicken polyester resin as a filler? I knew someone that used Bondo and had to pull their boat out after a week and remove the Bondo.

[@tomharrell1954]

What is the size of the spray nozzle on your gel coat gun? What is the pressure ? What do you use for a thinner?

[@BornAgainBoating]

That I don't know, I just prep it and have a friend of mine do the spraying :/

[@tomharrell1954]

Born Again Boating I don’t know if you are interested but I use a HVLP sprayer by Devilbiss For thick gel coat no additives Nozzel 2.3 mm 60 pounds at the pump Bigger would be better but it does not give as nice of a job. It’s really to thick to spray without a thinner/reducer. I am a hobbyist but have painted several. Got two to do now. But I compare with others cause I am not perfect yet. Styrene for thinner.

[@newgeneration3496]

Any chance u could have a video directed towards the spray gun and gel coat setup and what u did to spray step by step? Gun size/gel to styrene mixture/wax additive amounts?

[@BornAgainBoating]

I don't but Andy with @boatworkstoday does have some videos about that :)

[@oarfish12]

How do you make the gelcoat to cure without wax?

[@rockcrusher4636]

Please tell us what this job would cost. Great videos, thank you.

[@harryvanhoo7235]

Fibre glass is amazing, but I really dislike working with it. Also very complex, what will stick with what and son so on. Me, I will learn how to tig weld, and use steel and Aluminium. Mind you, not mastered this yet. All of this has huge benefits. Up to us, OK choices.

[@Mroswaldo16]

So gel coat can be sprayed? Im going to paint the boat my self in black. What bondo will you recommened for some body work in hull? And black gel coat?

[@rafaelreyes4251]

hello I really liked your video thanks for the explanation, could you make a video how to prepare the goal gel to apply in a spray gun thanks ...

[@woodyahh2110]

On final coat apply a cure film over your gelcoat I use dawn dish soap

[@akhuntfish7557]

What does that do? Just curious

[@woodyahh2110]

@@akhuntfish7557 allows the catalyst to cure the resin with no air After it cures hose it off with water

[@DMF351]

Is that straight gel coat that your spraying? Have you thinned it down, it’s normally to thick to spray on and leave a nice finish.

[@ferrellcat5860]

Got a question, I bought a boat . The gel coat or paint has not been taken care of ... if you wipe your hand across the boat in most areas , the white paint comes off on your hand , like rust dust but white paint dust ... can I try to polish this boat or what needs done ? Any help would be appreciated

[@remasters8182]

Curious, where did you get your tent/covering/carport thing, looks well made.

[@vivimu]

quonset hut

[@seanyounk1]

Just curious, could you mount the engine right onto the Transom? Any reason not to do a low cut transom so it is easier to board?

[@MichaelandMaryH]

How many days did it take you start to finish. I’m about to do my Robalo R235 which has a very dodgy transom. 🇦🇺

[@BornAgainBoating]

It depends on the project, and whether you are including the time of the bracket install, bottom paint, rigging, engine, etc. or are you just talking about the time of the fiberglass and the fairing and the gel coating? Fiberglass and Gelcoat, it was around 10 days, from demo to glassing, to fairing and gel coating

[@MichaelandMaryH]

@@BornAgainBoating thats what I needed. Thank you for that. I’m not using a backet. So will allow another few days for derigging and reinstall

[@johncartelli]

dont forget use some sort of rubber gloves to prevent acetone from absorbing into your skin

[@jesseware7019]

i wash my hands with acetone

[@johncartelli]

@@jesseware7019 then your a fool talk to your doctor about the hazards

[@toptotti70]

Nice work could please tell what spray paint your using, I have an old boat could I make the gel coat gloss again without respray

[@BornAgainBoating]

Depending on how bad it is. A wet sand and compounding may get the boat looking pretty good again.

[@toptotti70]

Born Again Boating many thanks

[@BrokenRRT]

Wet sand and buff with 3M gelcoat restore. Bunch of vids on KZbin how to do it.

[@tomharrell1954]

Hi Mate hows your BONDO doing????? Cracks ? Swelling? Soft?

[@BornAgainBoating]

All good! No cracks swelling or anything

[@jasonu1123]

Dude..... That's all going to crack and take the gelcoat on top along with it.

[@spanishjo4282]

Do you need extra solid wood strip to strengthening the hull? Is Fibreglass hull itself strong enough to hold the storm or choppy water without reinforcement solid wood ribs?

[@duffymp48]

Could you have used an epoxy primer coat prior to the gel coat?

[@BornAgainBoating]

Thank you for your question! Please post it in our Born Again Boating Community! Go here and scroll down to access - it’s free: www.bornagainboating.com/

[@jackholland10]

No, Gelcoat is polyester based so would not stick to an epoxy primer

[@Chanharp]

What kind of Gel coat is that? I have seen couple videos now where people just spray it on and don't even have to cover it to harden the outer surface.

[@bullykuldo6233]

I don't know if you did this or not get a straight edge the width of the transom and start from the bottom and work your way up and from let to right and that will give you all your low spots and how much you have to fill and fare ?

[@br5498]

Dura-Glass works great on boats, above the waterline..

[@williambranham6249]

I know nothing about bondo, other than when someone says car repair, I think Bondo. Why is it good for auto body repair (lots of exposure to water and flexing.

[@wei9070]

Love your job

[@fishermanonly7846]

Can you do a video on blueprinting a boat hull

[@markkus1134]

What’s the difference with waxed and non waxed gel coat I have a skiff that’s primed and I want to sand it smoothly out the fiberglass and then gel coat

[@BornAgainBoating]

Non waxed is usually like a laminating layer that you are going to be applying another layer on top of immediately after you lay that layer. You use the waxed layer as the last layer and that seals the gel coat and lets it cure properly. If you are laying multiple layers, you can't layer over a waxed layer becuase they won't bond properly.

[@markkus1134]

@@BornAgainBoating ok thank you

[@PFLEONARDI0906]

I love your videos, but you should be using nitrile gloves when working with acetone. Keep the vids coming! Stay healthy my friend....

[@jonahsroka2346]

Love your vids. What is your favorite way of fiberglass 406,407 or 410 or the Bondo

[@BornAgainBoating]

Probably the 407