Just the paint or did the primer chip off also? We've been filling in a couple chips ourselves and it takes time but the results are good. You'll need 600, 1200 and 2000 grit wet sand paper. Use the 600 first to get the edges smoothed, be careful as it will take the paint down quick next to the chip. Using a small brush, fill the chip with paint using several coats and wet sand with the 1200 between coats. Once you have it built up, use the 2000 to feather into the surrounding area. Mix your clear and catalyst together 4:1 and apply. Use liquid rubbing compound to finish off.