Originally Posted by Dirtdrop
The Duplicolor adhesion promoter isn't for use on bare metal. I'd use self-etching primer if I were you, even if they they claim that the wheel paint doesn't need primer. In my experience, you always get better adhesion if you use a primer.
I contacted Duplicolor and asked about primer. The wheel coating paint is designed to be applied on cleaned metal, and a primer is not recommended. Of course, I will scuff the metal with some 400 grit sandpaper before I paint. As for the adhesion promoter, Duplicolor has at least two different products with the same name. One is designed for plastics, the other for metals. I asked Duplicolor about this as well, and their response was "You don't need it, but it won't hurt".
Here's a reference to using wheel coating paint on a PC case:
http://www.pocketpcmag.com/forum/top...TOPIC_ID=13666.