I just had the guys from http://www.mobilewheelrepair.com fixed the rim that I curbed for $75. The rim looked as if it was never scratched and they came to my office to repair it for under an hour. I'm impressed!

I took some before and after pics for comparison. Here they are:

 

Bob,

Tru-wheel in Hollywood (north Hollywood I think) repaired my SF challenges. $425 for all four getting a strip and repolish and one curbed. Had to repolish after Metro Infiniti in Monrovia, CA used chemicals to clean but wouldn't admit to it. Repolish looked really good, and if you have only one done it will probably look different from the rest of your wheels, as I believe they will not be able to fix the rash and keep the anodizing. Don't quote me on that though.