I knocked over my colour coded 355GTS roof panel yesterday whilst refitting it to the car. Doh! I have chipped the roof paint in a few places, (not too badly), and wondered if anyone had any insight into doing a good DIY stonechip repair? I've heard that building up layers of paint with touch-up, then gently finishing it with v. fine wet & dry glasspaper & T-cut or similar does a good job. Anyone got any views/experience? Robert.