Hello fellow travelers. I keep my 2020 Travato outside in storage. This summer the sun baked my tires, and plastic/metal parts. I use CRC 303 UV protector and put it on most of my plastic parts.
I was cleaning the top of my RV, and found that the metal brackets holding my solar panels had rotted off the coating and the brackets were rusting. I scraped the brackets and put on electric rubber coating which works well on metal parts. The other issue was my tires parked on asphalt had gotten flat spots from the heat transfer even with tire covers. I now have put gravel down under the tires and learned to drive the vehicle monthly and run the generator. I guess a lot of us don't check the hard top on our RV's. I did clean the rust spots off the areas under the brackets before it ruined the paint. I am putting a new coat of wax on the top when I get home next week. So in my opinion doing PM sure keeps things looking nice and lasting longer. It will help on resale.
My new Goodyear workhorse tires sure run well. LOL.