My wife's '09 MKS is cinnamon metallic, luv it, and still get compliments on it, and it is over 3 years old. I keep it washed weekly, do it by hand, and keep it waxed, on a regular basis. Bought this stuff called Nano Diamond Shield, guaranteed to last for 12 months. Did the car with it back in April, and it still beads up as though I did it last week.