Thankfully my wax on, wax off days are done. I did that last year. I worked for hours applying two coats of Mequire's marine wax. The results were marginal so I stripped off the wax and applied Zep high gloss acrylic floor finish. A Zep finish does require a couple of coats but the application could not be easier. Just dampen a rag and lightly apply thin coats.
After applying the Zep wax, I took a long trip and returned as winter arrived. When Spring arrived I gave the RV the first washing since applying Zep. In fact I barely had to rinse the RV. The dirt came right off and the finish was still shining. There were none of the typical black streaks that used to take time to remove. I did have to do some cleanup on the nose of the RV to remove dried on bug streaks. I brought the finish back by spending all of about 5 minutes wiping on a new layer of Zep.
If you are really worried about damage due to UV rays, you can wipe on a coat of Aerospace 303, let it dry thoroughly and then coat with Zep. My RV has is 14 years old and has been stored outside and seen plenty of sun in the desert southwest. I don't see any signs of UV damage. Even the decals look good.