This is what i used, it's their "German Wheel Scuff Repair Kit"
http://www.amazon.com/gp/product/B00...ilpage_o07_s00
I also used Bondo's "Plastic Metal" to fill the curb rash. Sanded it down with 200, 400, 800, 1000, and 1500 grit. Mine were pretty rashed so I decided to refinish the whole wheel. But I believe this can be used to touch up some rash.
under $100 for materials for 2 wheels. not sure how much a wheel repair shop would charge for this repair, but i thought it was worth a shot to DIY.