If you feel like DIY'ing it... read this:
http://www.sonus-usa.com/car-polishing-clinic.html
(page down to the "chip and scratch repair" section)


For me, I got hold of a Paint Chip Repair system (Mom's) from Renault.
I tried it na on a small section of my car which was hit by the handlebar of a pedicab in C5. I managed to get it down to barely noticeable by me (and completely invisible by others, ehehehe). My car's paint is Nighthawk Black.