Excellent excellent read. Yes especially if it is from the well. Hard water stains = rust here in Florida, it also stinks real baaad!The shop owner sounds very protective of the women's identity. Maybe when I'm up in the Bay Area I'll pop by his shop and he may be a bit more relaxed.
As an aside...Anyone in Los Angeles with a dark vehicle, stay away from the sprinklers and hot sun. They are a lethal combination. Two hours and two detailers later the water marks have finally been removed d#$m it.