Also, I've heard bad things about PC'ing forged wheels like the BBS's.  Cast wheels are usually OK, bot the consensus is that you're basically annealing a forged wheel at the 400 degree temperatures most PC ovens run. 
 
FWIW, I'm painting my BBS's, and that's the only way I could see to get the silver lip you want (mine are going to be satin black again).
		 
		
		
		
		
		
		
			
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