Ouch, was just going to say, looks they used sandpaper to wash it. Sorry to see that.
I hate dirty cars, but with the hosepipe ban I would rather have a dirty car than one that ends up looking like yours does now. In fact, I had my neighbours think I was barmy when I was washing my car in the pouring rain last week. At least it was wet to start with and the rain rinsed it down perfectly.
Much better than the scratch parlor down the road.