There is actually a hand wash place not far from my house. It is housed in what used to be an automatic car wash, but the machinery was removed. Humans hand wash the cars. They still use the blower, then other humans wipe down the car. I‘ve had mixed experience with other vehicles. Sometimes the result is as good as I would do. Sometimes not. One of our local gas stations has a truly touchless wash. You drive into the middle of the bay and a laser guided set of sprayers clean the car. There is a blower at the exit. I remember that the blower made the hood on my Tacoma visibly ripple like the Tacoma Narrows Bridge just before it collapsed. It left no mark on my Tacoma. Still, I’m not sure I’m willing to put the delicate aluminum hood of my M3 through that. The M3 is a lot easier to hand wash than my prior vehicles. I can reach the entire roof without a step ladder or standing on the door sill. And there are almost no obstructions to a wash mitt. But I live in Florida and don’t have to deal with road salt and the like. Having grown up in the North, I can appreciate the desire to use an automatic wash.