I have a Black 2017 C MAX that I clean and polish faithfully. However, I noticed a common issue on the bottom side flat black molding(below the door) that tends to turn to a white haze over time. It seems common on other identical vehicles. I have used both McGuire Carnuba and Turtle Wax ICE....they both use to enhance the mat black finish , however, it seems they don't holdup anymore after a few hand washing. Does anyone else have a suggestion. I have seen some other C MAX owners vehicles where the molding has turned a horrible chalk white from the original black!