Try scuffing and painting an area on the inside of the wheel where it won't show if it goes badly. If the paint sticks OK you should be good to go in that respect. I did find this in reference to painting over power coat. Only time will tell if you'll get any red showing in the creases. My main concern in that area would be the amount of material build up if you paint over powder coat. PC leaves a lot of material on the wheel and painting will add more. The more material on a surface with differing expansion characteristics, the larger the risk of the paint checking. Probably the safest route would be to do as noted above and have them blasted again.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.