I often use those self serve bays for my company car when I am on the road. They are a great way to dress up the vehicle and remove the grime. He is absolutely right about the scratchmaster 5000 brush. I did cringe when I saw pressure washer hose drag along the bedrail. I often bring wash mitts with me and I use their foaming soap. Many placed do not have dryers so I always have a my portable cordless dryer with me. A Griots PFM is always in my car as well.