I agree..base coat, clear coat urethane...all factory paints these days are extremely thin and won't handle much sanding..you might want to try something like old,cheap turtle wax brand polishing compound first
The love bugs we have here in Florida (in May and in September) will etch the paint if not removed in 24 hours. The '02 I just bought has damage on the side window frames. I have to say, the paint does not look like it is clear coated and the solar yellow touch-up does not have a corresponding clear or so it seems. Maybe I'll try a test sand in a non-conspicious area.