A man washes the salt off the underside of the Green Weenie. I had just driven six miles on the salt flats (to and from the World of Speed event) and my car’s underside needed a bath---note the salt in the front wheel well.
He was operating an on-site car washing service at the Bonneville Salt Flats during the event. Vehicles coming off the salt flats were salty. For $20 he would wash all the salt off. For about half that amount he'd let a driver do the washing. I paid him to wash the Green Weenie; this was a lot more convenient---and thorough---than washing it myself here or at the self-serve car wash in Wendover.
He had a large portable swimming pool as a water tank. The water had been delivered by a water truck. A gasoline-powered pump provided water pressure to several washing hoses. Three or four vehicles could be washed simultaneously if drivers did the work themselves.