I use Sherm's Plating in Sacramento. They have three different levels of polishing, Street, Show, and Stupid Money, (or something like that ). Their street level is really nice. I've never had them do any wheels, so I don't have an idea of what they would charge, but their work is outstanding, and have a very quick turn around time compared to other polishing/plating shops I've used.
Rite-Way Wire & Wheel Specialists, Walnut Creek (925)933-4046. These shop is highly regarded by exotic car owners for wheel repair.
I had Walker do some valve covers and a dash insert, came out very nice. A buddy used Walts' Custom Polishing , also in Shasta Lake. PM me and I'll send you both phone #s'. Steve