Thingy said:
I would never dream of using a pressure washer on the caravan or car, its for the patio only. We use fast glass a lot on the car, didnt occur to me to try it on the caravan.
I use Meguiars 3 stage system on the car and it comes up a dream. That said, reading all this and the amount of work, I may get Tourershine in the spring.
No issues using a pressure washer on the car paintwork. The fan shaped spray pattern won't do any damage, unless there is damage already there. The dirt blaster might take some paint off though. https://www.kaercher.com/uk/accessory/dirt-blaster-pressure-washer-lance-26432440.html
I will admit, I cleaned 2 cars and the caravan before my last trip and was absolutely done in. Cleaned my car and the caravan again when we got back, Gtechniq coating made it easier, but I was about ready to drop when I got to the last bit. I also cleaned the toilet cassette, but didn't get the time/energy to clean the inside of either car or van. I always try to do too much in one go.
Edit: Regarding car detailing, the experts seems to prefer as little contact washing as possible to reduce wash marring; pressure washing and snow-foams are used to reduce dirt & grit on the surface.