The previous gray color that was used on the caps had fading problems and were painted in warranty. I don't know about the new color, I had a 2012 white Bighorn and my front and rear caps are loosing their luster even though I wax them twice a year. I have all but resigned myself to the fact that the shine will eventually be dull. The sun really raises Cain with them and their shinny life is short lived. I suppose that is why a lot of manufacturer's have switched to painted caps.
Wise you luck with yours, I don't know how many are out their with our type cap, but you should get some responses on the forum.