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He said that if he were painting my car, he would just wetsand with 600 since the body was pretty slick, then paint. I was under the impression that the paint needed more to "bite" on to. Also, he said that it would not be a problem to apply filler over the paint. Just rough up the problem area with 80 grit, apply filler, etc. Is this ok?



Personally I would not feel comfortable with 600, but would with 400. As for filler over paint, I think 80-grit is too course. I would recommend 150 to 180 (only for small dings of course.) You'll find that it's easier to feather the filler into the paint when you work your way down to the finer grits. You are also less likely to have scratches appear as the paint cures, a year or so down the road.




I was thinking 400 would be better as well...

As for the filler, I am using it for small dings (i.e. door dings) so I may give 150 a shot.