I have never been able to find any paint that was an "exact" match for old paint. And, every year, "old" paint changes its color a bit. When I have used colors that "almost" match, it simply draws attention to what a third-rate painter I am.
So, for touching up "dime" sized spots, and nicks and scratches, I just rub the old paint clean with alcohol and touch it up with clear fingernail polish. If I were a fanatic about color matching, I would go with fingernail polish. Every color you can imagine. Many colors you can't imagine. Easy to remove if you mess up.
Nail polish probably about as durable as a typical factory clearcoat. I usually let the "base" coat dry, and then put on a second coat. Soap and water won't take it off. But, nail polish comes off easily with nail polish remover.
Last edited by alanbikehouston; 05-16-05 at 06:59 PM.