resist the urge to paint thick, and wetsand with a coarse grit, and speed polishing by pushing on the polisher, ect....it's like what drives us to touch wet paint just to see if it's magiclly dry right after you paint it!!!!!
apply the paint as if you think it's way to thin, then it'll be fine.

exit1965, there must be a cali thing about your paint, i painted a test piece with my finger on thick just to check color, did it with my finger on a 4"x4" area, that was 5 days ago, no way i can scratch it off.