I painted mine black, all i did was go over the rims real fast with 160 grit sand paper. The i gave it about two coats of black spray. I haven't had any problems with it.
No offense to the other guys but the way they did it seems like overkill to me. I mean i'm sure its going to hold up a hell of alot better than mine. But mine has been through mud, dirt, rocks, grass and pretty much anything else you can throw at it and the paint has help up fine.
I dont count it as overkill at all really. Everyone does everything different and thats cool I:I Im not saying your way is wrong or whatever but my theory is, if your going to spend the time and money to do it, do it right the first time.
how about a frame