I used DuPont ChromaBase BC on my car - and it covered very nicely. It seemed a bit thin (it wasn't), and my supplier showed me the code (Valushade) of how to make a particular color cover - I had done it right. Unfortunately my info is in storage pending a move, but here is a link to some of that info:

http://pc.dupont.com/dpc/en/US/html/...-Coverage.html