I used Rimdoc to refinish and paint a set of older wheels to use for a winter tire setup. They're in Glen Burnie, MD. They have a guy pretty much permanently stationed at the Mercedes store at the Silver Spring Auto Mall. He does all the on site work for them and BMW and others (Porsche, too?) who are in the Auto Mall. I bought my car at Silver Spring Porsche and live in DC part time so it worked fine for me from a logistics stand point. You can drop off a wheel to him and he'll take it to the shop if it needs more than he can handle.
I thought the work they did was good, not great. But then, when your wheel's got rash, good is often good enough.