I haven't painted the bezel rings yet but am going to. All the info you need on painting them should be on my earlier post about painting the door pulls...except how to remove the bezel! lol. And THAT I can't tell you yet since I haven't done it. But,
afaik, they can be removed and either painted or replaced.
Here's a link to the thread:
http://986forum.com/forums/diy-project-guides/22376-diy-aluma-look-interior-pieces.html#post193438
If you're wanting some color other than the alumina look I can't help you with any of that info about paint colors/formulas etc . sorry.
Bob