In Germany people get upset about everything. But, of course, I always hand wash the Sky. I try to go to the local car wash either very early in the morning or late in the day when there are no other cars, and I've yet to be told off about bucket washing the car, but I'm sure it will happen eventually.
The real disappointment is that the car wash used to be open on Sunday and now is closed, like the rest of the country. It was the perfect time to take the car for a wash. (Then one has to ask--why is a coin-operated car wash ever closed? Who knows.)