“The cars leave with lots of scratches....”
No kidding. Wouldn’t even come close to cleaning a car here in Colorado after driving it around in filthy snow for a couple of weeks. And yeah, at that point, washing like that you’re pretty much talking about destroying the paint job.
Maybe cars don’t just don’t get very dirty in southern California.
There is so much dust off the mountains and the desert. My car really needs a wash every week. If you skip the car washing too much, the dirt will remove the paint.
What it would look like.
http://2.bp.blogspot.com/-8HypGmsP1hY/TmZbf_hcdUI/AAAAAAAAEy8/RXQ30lu8FM0/s1600/RO+4231+004.jpg