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 Be advised all-my experience is that powdercoating will make them easier to clean brake dust but will not stop the gray from coming. Dow 7 or untreated will turn to gray under any coating. It's a function of the brake and wheel bearing heat. 
				__________________Chas.
 
			
			
			
			
			
			
			
			
			
				
			
			
			
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