Only fail on CC so far are portions of the door handles. Car lives outdoors year round, snows during the winter and 90-100 degrees during the summer. Used Mothers M-tech (OK), mothers cleaner wax (OK), Meguiars clay (pretty good) and Adams clay (better). I'm thinking the clear has a haze / milky look I think is oxidation. I don't need it to win car shows, but would like to see the color better. As I said, the light is getting blocked, so the color isn't as good as protected areas like the door jambs.