Stretch,I'm not sure what your asking,If it's raw aluminum,I'd clean it,6 or 800 grit it down,clean again and use an epoxy primer.If it's the aluminum air box,I never saw one up close but,I would think they are coated with clear,in that case,you could 6 or 800 it and paint.My buddy has an 03 but,it came painted black from the dealer.I'm sure Scott has done some and he'll probably post an answer as well.Hope that helps,Jim