Originally Posted by dillcc
High pressure water at the self serve bays scratches the paint?
I don't know about that, but I once knew someone who just bought a new Camaro and was a freak about keeping it clean. Unfortunately the guy wasn't very smart, and so he decided to use one of the 'foaming brushes' that are in most of the self serve bays.
You should of seen the look of horror on the idiot'* face when he saw grooves on his decklid, all the way down to the primer .. and it was then that I (er... um.. I mean this guy I know) discovered that the brush was loaded with gravel and tar.
But back to your question, I know a lot of people who refuse to go anywhere near a high pressure wash, saying it'* like a sandblaster. I would think it mostly depends on how close you get the nozzle to the paint; I wouldn't get any closer than a foot or so.