The best stuff for removing light scratches that I've found is Gel-Gloss. You can get it cheap at Home Depot or other hardware stores. It works on clear coat or any other type of paint.
2004 E60 530is, Delivered 12/12/03, TiSilver/LGrey, PP, SP,PS, PDC, ACC, FRS, Step, Xenons, clear bra, body colored rear inserts. (Retired, 1983 henna red 320is)
2004 Corvette Z06 Commemorative Edition