Repairing RUST on a Project Car | B Post Welding Repair on a MK1 Caddy

In this video we're repairing rust on a project car, tackling the dreaded B-Post welding repair which is a common area to rot out on the VW MK1 caddy. In our case, there was a previous rust repair hiding underneath filler that wasn't apparent until we had the project car blasted. Once we chopped out that repair it revealed more rust hiding and more work was necessary than originally thought. This is often the case when repairing rot holes on cars, what's visible from the outside is just the tip of the iceberg and it's not always possible to know how big a welding job is going to be before you make the initial incision.
🛠MK1 Caddy Panels & ROTBOX Stickers: goo.gl/jpnn6v
💥Plasma Cut Signs Etsy Shop: etsy.me/2srMSIJ
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Die Grinder: amzn.to/3gm84rT
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🛠 ABOUT ROTBOX
Hey! We're Mat & Len, a guy and a girl from North Yorkshire in the United Kingdom. We love making stuff out of metal and building cars together.
What kind of cars do we build? We mainly work on modern classic cars (anything 80s- early 90s) and right now we're restoring and modifying a VW MK1 caddy pickup #thatslammedcaddy
We're down for anything metalworking related and always love to hear your suggestions for what DIY project we should take on next in the comments!
Thanks for stopping by, if you want to see more welding, grinding, hammering, plasma cutting, press braking as well as all the ups and downs of our fabrication projects make sure you subscribe by hitting that red button!
Mat, Len and Daze the dog 👫🏼🐶
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DISCLAIMER: Our videos are intended to entertain and inspire, always take appropriate safety precautions, if in doubt consult a professional and don't attempt to carry out any work you don't feel confident doing. By using our videos, you understand and agree that neither Rotbox Metalworks nor any persons associated with it have any liability to you for any injury or loss you may suffer in connection with any content we may post.
All music is from the KZbin Audio Library.
This video is NOT sponsored in any way. All tools and materials shown/used we have paid for in full.

[@kingryan5849]

You are the fabricator, well done lad.

[@RotboxMetalworks]

Cheers mate!

[@kathrynsimmons7298]

superb workmanship enjoying every vid

[@peters4067]

Seriously underrated channel 😩😩

[@RotboxMetalworks]

Haha, cheers dude!

[@trampingfitness2]

Your attention to detail is incredible and I can not wait to see it completed!

[@RotboxMetalworks]

Cheers, the end is in sight now! 👍😀

[@angelmendosa4164]

Muchas felicidades. Muy buenos tus trabajos con mucha curiosidad calma a detalle todo un trabajo de primera muy artesanal. Saludos desde Iztapalapa cdmx.

[@user-sj4cd1qc2p]

Excellent work!

[@RotboxMetalworks]

Thanks!

[@ELVISPRESLEY-USA-UK]

Great work

[@RotboxMetalworks]

Thank you so much! 👍😀

[@christiangonzalez8239]

Muy buen trabajo hermano ni se nota que lo arreglastes al panel saludo desde Temperley argentina

[@ineedthatcar7169]

Stunning work! Need help on my motor - floor and A pillar required atleast!

[@t4california]

Craftsmanship 👋

[@nausicaaekundayo3104]

I have the same truck with so much rust.. you make this look easy! Peace and love from Cali

[@RotboxMetalworks]

Cheers man! It's just lots of practice, anyone can do it ;)

[@kevwood1114]

Brilliant work!

[@RotboxMetalworks]

Cheers man! 👍

[@WolfHausMotorwerks]

nice work on the panel!

[@RotboxMetalworks]

Torkwerks cheers 👍

[@j490tgm]

You sir are a genius This build just gets better and better The attention to detail is mega ☺️

[@RotboxMetalworks]

steve thornton thanks very much 😃!

[@fraserbiggins5158]

Another great video, very thorough work, this is going to look awesome when complete!

[@RotboxMetalworks]

Cheers!😁👍

[@bumflap1]

Nice job sir!

[@RotboxMetalworks]

Thanks!

[@tessiern]

Thank you for posting this video of the B Post repair. I have a 1980 Caddy with the exact same problem. I'm learning how to MIG weld now and will need to tackle this fix at some point after I get more experience with easier repairs. I've been looking for a video to explain how to do this and you came through. Thanks again!

[@RotboxMetalworks]

You're welcome! Cheers

[@VwRosstorations]

What is this magic you possess...👍🇬🇧

[@RotboxMetalworks]

Haha, cheers mate 👍

[@justinwilsoncustoms6520]

The repair panels are sooooo neat, truly nice work my friend 👍

[@RotboxMetalworks]

Haha cheers, always room for improvement though!😁

[@staccio80]

As always nice job!!!

[@RotboxMetalworks]

Cheers!!

[@choosyooozy139]

Wow your amazing👌👊

[@RotboxMetalworks]

Thanks 😁

[@czechgirlandtheyorkshireman]

Your patience and attention to detail is incredible! Hats off 🎩

[@edmilsonoliveira4890]

Muito bom, parabéns! (Brasil)

[@Autonerds]

Awesome! I just started the restauration of my 1st caddy and thats exactly what i'm looking for!👍👍

[@RotboxMetalworks]

Good luck!

[@VwRosstorations]

Autonerds 👍

[@John-fo9jy]

Great skills am very impressed I wish you were able to sort my crushed jacking points on my old golf.

[@RotboxMetalworks]

Cheers! We're just doing the panels and our plasma cut signs at the moment

[@deanoloughlin6129]

Just discovered your channel mate .love what your doing with the caddy. Im in the middle of my 1990 mk1 golf cabriolet build just done the engine. Bodywork next .are you a fabricator? Your work is good .regards Dean

[@RotboxMetalworks]

Thanks so much, that's awesome! I'm a trained mechanic and self-taught fabricator. Good luck with the cabriolet build, love those cars, nearly bought one a few years back just before they shot up in price. Cheers

[@deanoloughlin6129]

@@RotboxMetalworks your very good mate .you should be proud of yourself. I love my cabby ..its nearly done 👍

[@VENOMPERFORMANCE]

Прекрасная работа👍👍👍

[@RotboxMetalworks]

Cheers! 👍

[@prouteproutedanskiki]

Dommage que la ligne entre le montant et la benne n’ait pas été conservée. J’ai la même chose sur le mien, et j’ai pour projet de remettre ça d’origine. En tout cas, beau travail !

[@bealzibub4002]

Why did you chose not to weld the top of the rear 1/4 panel back into the structure of the b post? The b post is going to have lots more chance of flexing near where the original joint was with no support from the rear.

[@MrDarkHorseWM]

Was going that deep necessary? Ever heard of Tectal? It looks like solidified fat in a pan but it really prevents all these unreachable areas to rust further but good job nonetheless.

[@spagooter7901]

All he did was cut out surface rust🤦Provided it wasn't badly pitted I would have just treated it And remade the outside skin

[@miketeeveedub5779]

Fantastic work! I'm always amazed when I see welded sheet metal ground down, and it looks like part of the original sheet metal! BTW - on an unrelated topic, I noticed you have electric steering installed on the Caddy. Was that a kit, or something lifted from another vehicle? Got a Mk1 Jetta that I'd like to do the same to. Is it worth the money and the work?

[@RotboxMetalworks]

Cheers for the comment! The power steering build was our last video before this one 😀 Haven't tried it out yet so no idea if it's good but fingers crossed, we had a similar kit that we bought for our T25 and that was really good.

[@miketeeveedub5779]

@@RotboxMetalworks - thanks for the reply! I'll be sure to check your back videos, as I'm new to your channel!

[@sliminus92]

i still want those mounts for the rear coilovers... :/

[@neolee5814]

The hand brake was on the disk on Golf 5

[@gtruckus07]

That looked like a shitter! Cracking work yet again man

[@RotboxMetalworks]

Cheers dude!

[@stevenharpervw]

How do you find the time to both film and work on the car along with daily job and life in general ?

[@RotboxMetalworks]

Ha! We literally spend all our time in the workshop, as soon as customer work is done we're working on the caddy filming, it helps that there's 2 of us so Mat does all the fabrication work then Len does all the filming and editing 👍😀

[@K0bi87]

Nice job, but Iam curious what will you do on the other side to make it similar? (Iam referring to the panel joint that you have weld through) Br,

[@RotboxMetalworks]

Cheers for the comment, I will chop it out and do the same on the other side as it looks the same as this side, but when we bought it the seam was filled anyway so we could have just filled it again 👍

[@K0bi87]

@@RotboxMetalworks I see. I have a Caddy too. The chassis unfortunatelly has as much movement to crack the sealing/filler there. But if you will do the same matalwork on the other side, that will work for sure

[@sarahmacleod7435]

Henry Hoover be like "🙄 he gone deep this time"

[@RotboxMetalworks]

😂

[@autobodyrepairclearcoot4146]

Who did Dislike Dont now what is Art 😐

[@RotboxMetalworks]

Haha, cheers 😅 can't win them all!

[@EpicHoti]

Hey man great video! What is the dish for the Grinder called you are using at 11:52? Thanks :)

[@RotboxMetalworks]

Cheers! Do you mean the orbital sander?

[@EpicHoti]

@@RotboxMetalworks Hmm I meant the disk for the angelgrinder you are using from 11:52 to 11:58.

[@RotboxMetalworks]

@@EpicHoti yeah that's an orbital sander, not a grinder- different tool mate!👍

[@EpicHoti]

Oh okay, looked like a grinder kind of. Thanks :)

[@neolee5814]

Hi I wanted to tell you what I did to my caddy, back My back brakes was from Golf 5 and there was disc

[@RotboxMetalworks]

Awesome!

[@neolee5814]

i can sent you photos

[@paulwhite7475]

So relieved you didn't weld any GM parts in LOL

[@RotboxMetalworks]

Haha, not this time...

[@MrAdamfulwell]

Absolute craftsman fair play to you. Looking forward to seeing the finished Caddy. If your interested in having a look at mine I'm on Instagram @adamfulwell. Keep up the with the videos 👍

[@rosshovvels5305]

Mat i hope to god you have another indepth project in the pipe line once this SLAMMED caddy is complete. I need my Rotbox fix 😂 amazing work as always..... Whens the new Merch going to drop? You need some clothing online, christmas is only weeks away 🎄 and i need a new Hoodie😎

[@RotboxMetalworks]

Cheers! We'll check you out 👍😁

[@RotboxMetalworks]

@@rosshovvels5305 haha, cheers! We do have some ideas for what's next after the slammed caddy but nothing's set in stone, what would you want to see more of? We're open to suggestion 😂 Merch? Coming soon! Maybe. Need to work on some new designs. 👍

[@isgodrealcheckthisout3453]

*Rotbox Metalworks* Think about your eternal life bro!