This might do better in the wheel and tires section.
Why not look in to getting them powder coated or chromed? Not sure on your budget? I've never seen anyone use the duplicator wheel paint but I'm sure if you prep it well and take your time the outcome will be good.
I was just thinking the same thing the other day. I found this video on youtube while searching. If this link doesn't work, go to youtube and type in How To Refinish Wheels Using Dupli-Color Wheel Paint. This guy provides pretty detailed info and a video of the whole process. Good luck.