there is a right way and a wrong way to wash a car and I doubt they will even know the basics like starting with a nice frothy foam bath fallowed buy a 2 bucket hand wash with either sponges (sea foam are baller but synthetic are ok to
) or a wool wash mitt
however I am not saying it will not be fun, just hope that you are one of the first cars they do as I am sure they will run out of washing cloths/sponges/mitts pretty quick and then just use them dirty (dirty IMO anyway)