You could go the way a friend did when he scratched his dads car... he got the toothpaste out and gave it a swirl. Toothpaste acts like a really light cutting compound. Anyway, it was on a faded black bumper bar and he cut the scratch out and surrounding area leaving a new looking black part on his dads faded old bumper bar

ops: So instead of a subtle scratch he had an attention drawing new black bit
Personally ive used toothpaste in my time... 8) but for my car now I use Kitten cutting compound and Kitten wax pollish. It does an awesome job. If anyone wants I will post a pic of the results on my car?