I touch up my bikes with Testors model paint. Can get it at hobby stores and its good paint. You apply with a small paint brush. You can buy one color at a time or a kit of about a dozen colors. I have mixed a couple colors together in a small container till it comes close to original. Its hard to be perfect, but if its not a collector to you then this works fine and preserves bike. The paint quality is as good as the original.