I purchased a California 850 T5-R a couple of months ago and for a 10 year old car, the condition of the exterior is good. However, there is some fading of the plastic. It actually looks more gray than black and I am not sure what the original color was. I read about a product called ForeverBlack, but I not sure the plastic was really black to begin with. Any advice on products to restore the plastics? Thx.