[Perfectlap]

I only wash my car in one of those coin operated 'self serve' places. I bring a large duffel bag with my own car wash soap, brushes--wheel,tire,underbody,softop--, a chenille wash sponge, and the absorber drying towel. I also clay bar the car while washing.
total cost $5.

You can't really lift oxidants off of the paint without touching the car.