A glorious day to you all!
I have a 2018 fiberglass side 295QSL8. It had decals on it like "Keyed Alike". I did not want to advertise to would-be thieves that if they hacked one lock they could hack them all. Removing the decals by just peeling them off does not work. I used a handheld steam maker, like for drapes and such to heat the decals and they pulled right off. Using a blow dryer on a hard side RV is NOT a good idea, the finish pops off or even the sides can delaminate costing thousands to fix.
I had one paper-based decal glued on that advertised for the mfg of the composite sides. The steam maker took that one off as well but i did need a PLASTIC scrapper as an aide. There was glue residue left behind on only that one. I used GOO b gone as directed and it worked perfectly removing the glue. Tip: use very, very hot water to wash off the glue residue and GOO b gone.
I have attached a couple pics.
I got the steamer at a local 2nd hand store for 3 dollars. You can get a good one online for 20-30 dollars.
search for handheld steamer.