yeah its a bitch, better to wait for a non windy day, or not so hot one, or wash your car in phazes, not all at once - the same way you do wax jobs. The exterior vinyl is a toughy. You can spary it down and make it look awesome for like 30 min and then it phades again cuz of its texture and material, so i have yet to figure it out cuz my car does the same. i think they may sell paint for that, ill check on it.