Did you lacquer them?
No, have yours been custom painted? mine were just off ebay i think and came in a sort of black chrome effect. maybe painting is the answer!
Mine came from eBay. I lacquered them as I was adviced to by other forum members to help prevent the colour fading. Look OK. Some of the shine does disappear once lacquered. Just put the back ones on. Will take a photo in a sec.