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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | Joined: Apr 2013 Posts: 101 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2013 Posts: 101 | I knew I had lots of work to do on my roof - there were tons of little blisters in the paint. I stripped all the paint off with a chemical stripper down to the original Chevy red primer. But I can see that whatever caused the blisters has eaten right down to the metal. Roof 1 Roof 2 Roof 3 Of course I don't know what caused this, but I am guessing some sort of acidic or base liquid. I doubt brake fluid because how would it drip like that? I do know the truck was parked in a carport under a tarp for a long time. Other than a good wash with soapy water, does anyone have suggestions that will prevent whatever substance it is from ruining any new paint I put on? And any tricks to prevent surface rust on the bare metal after I wash it? Thanks. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Ted,
Are you able to clean it down to clean metal?
- chemical grease remover and/or paint remover
- media-blasting
If you have clean, rust-free metal (even if it is pitted), prime with epoxy. That will seal the surface and stop rust. You can paint later.
| | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | not from a 'substance', simple result of tarping directly on the metal, condensation from our acidic atmosphere trapped and 'cooked' over time .... clean it well with a good brand 'wax and grease remover', sand it well, wax and grease remover again, prime and paint .... epoxy primer is best, but I'd get it all to bare metal for that
Bill | | | | | Joined: Apr 2013 Posts: 101 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2013 Posts: 101 | Thanks Tim and Bill. I can easily get to metal now and I have wax and grease remover. I am also using epoxy primer. | | | | | Joined: Apr 2013 Posts: 101 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2013 Posts: 101 | That was great advice. (It is one thing to ask for advice, another to take it.) By stripping all the primer I am able to distinguish the etching from actual rust. I am going to touch up the rust with the grinder. I have a picture of the truck from about the 70s I think and it has a roof rack on it. I am sure that is what caused the major rust lines. Thanks again Bill and Tim. The wet sander Bare metal 1 Bare metal 2 | | |
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