sorry to bump this, but i didnt know where to put it..
..if you guys with grille /brush guards hate the hazy black color they get with aging / washing / weathering, get some meguiars trim detailer (use this on your weatherstripping and plastic molds as well) in generous quantities and watch it sparkle!
it took me about 10 generous applications until the shine stuck for more than a few days / rain storms but it looks a lot newer, cleaner and better than it ever did before.
this is a pic of the product: