I've taken my car twice to the touchless drive-through car wash in Merrifield off Rt 50. The car wash is part of a gas station (Sunoco I think), opposite the Sweetwater restaurant in Merrifield. The most expensive wash is $10. I think the wash is pretty effective, the car came out mighty shiny after (they add some rain-x clearcoat stuff)...I recommend it.
My car is zaino'd by shim. With a touchless wash there is a possibility that the harsh detergents might strip away some of the sealant. BUT I figured with 2 inch of grime on the car, the zaino layer is pretty much protected in the wash
