are they magnesium mate?
if so, u wont be able to powdercoat them...
the baking temp is too high and will ignite the mags
if they are alloy, you can powdercoat them, if u need them done i can get them done for you professionally..
i have a good contact who does awesome work
specialises in powdercoating rims only!
strips it with paint stripper
bead blasts it
repears and scratches
cleans them up
primes them
and powdercoats them with very fine powder from dulux
bakes them..
if your interested let me know and ill arrange for them to be done
takes about 1 week