I also learned how to fix the dull on our roofracks and the window thingies on the bottom of each window (black trim) from its dullness, "Mothers Back To Black" after about a couple washes it'll start to soak into the material and less and less of that solution will be needed each time and it'll stay black and shiny new looking longer after each wash.
Actually just did this on my girlfriend's Charger... the black molding around the windshield was very dull grey, but is back to black now
