You can buy DIY Ceramic coat products. I just purchased Armor Shield XI for my car and truck, plan to apply it this spring. Not sure I would do an entire RV. Its a very slow process having to do 1 small section at a time. I think a good auto wax would be easier or others use floor wax?
I think the ceramic, products like F11, anything that says you never have to wash again, is a gimmick. I have F11 on my car now and the shine is great, but I still have to wash it as often as any other product. Ceramic seems to have a nice shine and makes washing easier, but its just the newest miracle wax...