prepping rusty panels for paint
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Senior User
Joined: Jun 2003
Posts: 285
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From: Kannapolis NC
prepping rusty panels for paint
I know some one in this group can answer my question. panels such as roof or door panels which had surface rust that I have sanded, buffed, stripped and everything else I can think of still have a texture which may have in the bottom of it some residual rust. I can't cut out and replace everything so when do I stop rubbing and what is the process to get a primer on the surface so I can start sanding for paint? Do I treat with oxisolv? If so do I need to sand it prior to priming, Can I skim with body filler? Any help, I would be grateful, Thanks
Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
Any of about 1/2 dozen metal preps will handle the rust hiding down in the pours of the metal. Then a good epoxy primer and sand down should smooth up those old panels. You can prob get a lot more attention in the paint forum of this site. Good luck, Jag
Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
Do sandblast or chemically treat the panels before painting or the rust will pop thru. I prefer the liquid rust converters that turn the rust black rather than covering it with another paint product. Then paint over it with an epoxy primer. If the texture still shows thru after blocking the primer fill it with a catalized spot putty (NOT body putty!) such as Eversoft, reblock and reprime.
Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
I use Red Devil rust converter available in the painting chemicals section of places like Home Depot, Lowes, and some hardware stores. It comes in a white plastic bottle with an applicator pad on the side. It's a thin clearish liquid you wipe or brush on and let dry. Rust will turn black almost instantly but it will have little to no effect on clean metal so don't waste it on clean smooth panels. I use two coats on any exterior surfaces. Once it dries you just paint over it like the rest of the metal.
