Like cerakoting a gun? You might want to browse the threads in the "refinishing" section of the forum. There is at least one vendor who gets recommended for that kind of coating work, but i can't call their name, sorry.
edit* I think this is the recommended vendor i was thinking of, but wait for somebody else to confirm that: http://www.ccrrefinishing.com/info.htm
Maybe looking at their website will help you pick a type of "dip".