Best way to prep rallye wheels for paint?

Wow. What an incredibly diverse set of opinions here. I guess that's what makes a forum great. I have to do the same thing. I have a can of Mopar Argent and it does not state any need to prime the wheels first. I'll follow the directions but I had a paint "pro" tell me once there is no such thing as self-priming paint (even though there is, he meant it doesn't work).