WAX YOUR CAR (ESPECIALLY IF ITS A DARK COLOR) as much as you can, waxing a car is not bad for it, but it adds layers of protection I use MOTHERS because it comes off pretty easily, and it leaves a great finish. Smooth and the water is gonna bead on it amazingly...wax at least once every two weeks in my opinion to keep a black car or any other dark color from scratching and swirls.

Please stop posting ridiculous things. Do a search, this topic has been covered before.