To your earlier question - - -I blasted the inner structure of my car and sprayed it with epoxy primer. The exception to that was the inner roof structure. I wire brushed and wire wheeled it and brush on a POR 15 like products -- I forget the name right now. I wanted to have everything coated with something, even though it will never sit out in the elements again........
If you clean it up with scotch bright as best you can, a good epoxy primer will stick and protect it pretty well.
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