I did mine myself. Not too hard just alot of work. Sandblasted them then sanded and polished the lips & runners up like chrome. Then taped off the polished parts (runners/lips). Painted the rim with a silver paint I found that looked nice and clear coated the wheel with a satin clear then pulled the tape off and presto a new looking wheel cheap.
I could refinish sets like the set I did, but it takes alot of time to do and the time is where it gets expensive. I would also only sand the runners & lips to look like factory because it takes too much to bring them up like I did on my set. E-mail me if your intrested ....Ed