I helped a buddy of mine re-finish the wheels he used for snow tires.
We used aircraft stripper to remove all the old paint, then Dupli-color wheel color & clearcoat to re-finish them.
It came out decent. If we had been more patient with the painting, it could have been better.
Here's a vid I found:
http://www.youtube.com/watch?v=q5eK5OnHfqA