My wife's car is black. While I was away she took it to a car wash. The kid who dried it used dirty towels. It took me a weekend to buff out the swirls.

As others have said, if you go to a quarter car wash – the kind that uses a wand – just be careful where you point the spray.

The safest way to clean it is to do it yourself. Nobody cares as much about your car as you do.