Kid moved to an area where they don't allow runoff while washing cars. Not clear if that includes rinseless (our preferred method) or not. Car manual is surprisingly detailed. They like plain water, pressure wand not too close to the paint, no harsh detergents, no swirl-o-matic. (well, they don't exactly say no swirl o matic. They just say it might mar paint.) So: Is coin-op hose-off followed by a waterless wash a viable option? If not, what? Touchless? What about the caution about no harsh chemicals? Do they really just mean "no Dawn soap?" Bite the bullet and go to the swirl-o-matic? What?