Check with your LBS, they should be able to order touchup paint for you, or go to an autoparts store and look at the small bottles of auto touchup paint. Also check out a hobby shop for model paints. With a little bit of care, using some primer to build up the chip, you can fix it so that it looks like it was never there.

I never would have thought of nail polish, but that's an idea too.

Enjoy

Steve W