So im putting together some junk, and i had to put in a few patch panels. I ground the welds down and sprayed some rattle can paint over it all to keep it from rusting. Now im ready to for a little filler and some sanding to get it good, or should i say "gooder". So do i have to completely sand and remove all the rattle can paint before? Or can o just scuff it up and go for it? I tried some googling, but couldn't really find what i was looking for.
Your filler will adhere to the paint just fine, if it's scuffed first. Will you paint stick to the metal as well? That is the gamble. I wouldn't.
Or gas. Painted a carb one time, looked good until it got some gas on it, paint peeled like an old barn. I'd go back to bare metal if it was me.
I'm going to say that it depends on which spray paint you used, and how the surface was prepared before the spray paint was applied, and how long ago it was spray painted. Lacquer thinner doesn't have much effect on the old oil base paint from years ago, after it has cured. I'd say get as much of the old paint off as you can. "Gooder" will be OK because you are probably not expecting it to last forever. Then, if you want to go back in someday and make it "more gooder", the old filler has to all come off or cracks between the new filler and the old filler happens.
Ya. Its not real old. Its rustolium, so im guessing it should come of with lacquer thinner. I just wasn't sure if all that would be necessary.
If you are going to do a cheap paint job or a primer thing, whatever. If, on the other hand, you are going to put some paint down and have something that endures and looks good, no way. Risk-reward. That's like hitting driver off the deck over 250 yards of water. Better off laying up
I have never seen a good result from building over Rustoleum. Knock it all off, prep, using a compatible paint system and refinish. Otherwise it is just a matter of time before it bites you in the a$$ ( as in time & money).
The Jalopy Journal
