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Strip To Bare Metal Or Paint Over Old Paint


 
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Duane WI
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PostPosted: Fri Jul 05, 2019 4:24 am    Post subject: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote

I am almost done with the rust repair on the 52 Chevy Pickup. I was going to start stripping off the old paint to bare metal and am second guessing that. In areas that didn't have rust like the top of the cab the old paint is solid. It has a coat of rattle can paint over the top of the original paint. The rattle can paint is at least 10 years old. I am thinking of block sanding the old paint to use it as the first step of getting everything level. Top coat with epoxy primer and then high build primer. Then do the finish block sanding before final paint. What are your thoughts?
 
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Stephen Newell
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PostPosted: Fri Jul 05, 2019 4:37 am    Post subject: Re: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote

Even the factory paint will flake off some day. What ever is applied over the top will flake off with it so the only way to have a finish you can depend on is to take it down to bare metal. Also sometimes the metal will rust under the paint and it doesn't show and you don't know it's there until it's taken off. Since you already have issues with rust in spots the best thing you could do would be to take it all down to bare metal and prime the entire truck with epoxy primer.
 
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David G
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PostPosted: Fri Jul 05, 2019 4:52 am    Post subject: Re: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote

Bare metal.

If I wanted to totally restore one, I would get it acid dipped, there are places that do that, save a ton of prep.
 
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murray moore
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PostPosted: Fri Jul 05, 2019 6:01 pm    Post subject: Re: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote

Epoxy primer holds a good chance it will lift your old paint such as the rattle can paint. Rub the old and newer paint with lacquer thinner and see if it dissolves the paint.

Good chance any two part primer will do the same. Then your left with the choice of stripping, cleaning, prepping, filling, epoxy priming or sealing first, prime, block, paint, and rub..
 
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murray moore
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PostPosted: Fri Jul 05, 2019 10:14 pm    Post subject: Re: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote

Epoxy primer holds a good chance it will lift your old paint such as the rattle can paint. Rub the old and newer paint with lacquer thinner and see if it dissolves the paint.

Good chance any two part primer will do the same. Then your left with the choice of stripping, cleaning, prepping, filling, epoxy priming or sealing first, prime, block, paint, and rub..
 
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showcrop
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PostPosted: Sat Jul 06, 2019 3:27 am    Post subject: Re: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote


I have taken a '57 and a '67 down to bare metal. Both had their problem areas but more than half of both of them looked good. Under the good paint of both of them were hundreds of 1/16 to 1/8 rust spots.


About the acid dip...... When I was starting in early 2015 on the old car that I am finishing now, I had no intention of doing anywhere near so much. However, the mission crept. I could have saved a lot of time and work if I had removed the body.
 
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David G
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PostPosted: Sat Jul 06, 2019 12:57 pm    Post subject: Re: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote

Yup, that is why I suggested it, have been there done that and would have saved tons of time.
 
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Inno
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PostPosted: Tue Jul 23, 2019 11:38 am    Post subject: Re: Strip To Bare Metal Or Paint Over Old Paint Reply to specific post Reply with quote

If you've ever sanded down a paint chip you know that the small diameter surface ding gets a whole lot bigger as you begin sanding. Once it's sanded out you can see the discolored bare metal which to me would indicate a place where rust could start or maybe already has. Quick touch ups and skipping steps will come back to bite you in the long run.
 
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