Hey there, welcome to the site! I actually just got my wheels powder coated, check out my profile pic, I went pretty insane with the color! As for who, Excaliber Powder Coating here in the Springs did a great job. However, they're an industrial powder coating company so they won't unmount your wheels, take off your calipers, etc, you'll have to do that yourself then bring the parts to them. They will definitely take care of you, great guys. What color are you thinking about going?