[nova1313]

With a higher quality paint I've done 500ish. But I found if your cheap and go for the worlds crappyest paint you want to go higher grit for a smooth finish. The only problem with high grit is adhesion. Note when I say crappyest I mean that it's like the ebay type paint. IT does hold up just fine. IT just sucks for spraying and the like. Once it's on your gold though.

I think it was called rayflex that i used. It's uhm interesting to work with. But my sisters car looks great.