I know a lot of guys have powder coated their wheels and I've thought about it myself. Mentioned it at work the other day and was told not to do it because it can chip off quite easily especially when tyres are being fitted and over time can look quite bad. It was suggested to me that a better option is just to paint them because it looks just as good and is much easier to touch up. Must say I'm fine with painting - painted my radiator grill, have retouched it once in 2 years and it still looks great. Cost about $8 in total to do.
So, a bit off topic I know, but as Mittzy raised it, I'd be interested to know what the experience has been with powder coated wheels (and/or painted ones for that matter).