I had my ATS's done in a satin black and they turned out very nice, and so far no chips, but they only have one track weekend on them...
I have also heard that powder coating wheels especially cast wheels can possibly make them weaker, I forwared that info to my friend who is in the business and also a shifter cart racer and powdercoats many parts of his own , and he said it could be true but for wheels he bakes them in a two step heat process slightly lower to start and has not had any problems of parts failing.
So from what I know nobody knows for sure
Mine: