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Originally Posted by mlt
I noticed that many rocker panel threads are kind of incomplete :-) Almost in every case body shop and replacement is suggested. Nevertheless, I'm not ready for body shop.
What kind of body filler is recommended on rockers to get thickness over metal? Mine panel is not dented much, but the stuff on top of metal came off and rust stepped in. I removed loose stuff and treated it with permatex rust treatment/primer so now it is totally black. But I don't want to paint right over and get bump along the edge.
I stopped by local parts store. They have tons of various bondo products. The problem is that some of them should be applied to bare metal, and others are for small repairs. And I noticed that some ppl over internet don't like bondo.
Is there any time proven body filler to put on rust treated rockers before painting?
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You don't want to put any filler on any thicker than about 1/4 inch. And to get good adhesion, you need to put it on bare metal after a good roughing up with 60-80 grit sand paper that is free of ANY rust. They call rust cancer for a reason, if you don't get it all out, it will come back. If you have a very thin coat that needs applied, you need a finishing putty, most ppl call it "icing". I would go to an auto paint store to buy it. Icing can usually be put over an etching primer that has great adhesion qualities. The key to any body work is the preparation that you put into it. The better you prep it, the better it will turn out and the longer it will last.