One Shot pin striping paint is what I think most people would recommend. It comes in many different colors which can be blended together if their stock colors will not match and it's oil based enamel so any mistakes can be easily wiped off and redone. Eastwood's carries it as well as any good local art supply store. Eastwoods also carries a roller ball system for applying the paint but it's pretty expensive in addition to the special pin stripe brushes the professionals use. Speaking of professionals, you may want to price having one do it for you. I had my cab done for less than $200.
