anyway you could blast them?
I have a buddy that just does it in his garage...and can do rims...
he's got some blasting equipment, but depending on what shape yours are in, it may be better for you to do that part...
he just does stuff on the side, mainly for his own autos, and uses a old kitchen oven...
but, it's big enough to do at least a 16" rim...
he did several pieces for me a couple years ago...
I'm heading out of town for the week, and don't have his contact info with me...so if you aren't in a rush, and haven't found somebody by next weekend, I'll get you his number...
Greg