I wash by hand, but spray on soap with a Kartcher Detergent Bayonet Detergent Foamer attachment which sprays on the detergent foam with a very gentle spray. I have used Meguire's Gel wash, and Thetford RV wash and Thetford awning cleaner. This speeds up the washing portion of the job, and the foam is applied with less water pressure than a garden hose. (I would never use the force of the pressure washer on the camper itself.) Tough spots use Thetford Bug Bust spray. Wheels are cleaned with Meguiar's aluminum wheel cleaner. After making sure all the grime and soap is rinsed away (using either soft brush and/or microfiber towels, I wax the camper by hand using Meguire's Pure Wax and buff with clean microfiber towels. Afterwards is a good time to spray on slide-out lubricant and seal protector and treat the tires with Meguire's Hot Shine spray. The work detailing the camper (and my truck) is a relaxing way to spend a Sunday afternoon in my driveway and garage. I would only change to a machine buffer if my body protested too much from the hand-detailing work or I get a much larger camper.
2014 F150 SCrew 4x4 Max Tow Heavy Duty Payload 3.5 Ecoboost 6.5' bed Ingot Metallic Silver
2015 Rockwood Roo 21SS