I think the difference between the finish of a car and an RV is that some RVs have decals on them. My motorhome has full body paint, and I have used Blue Beacon many times with excellent results.
If your RV has decals, you probably want to make sure they are glued on tightly.
So, Warhorse, does your RV have decals or full body paint? You might want to put the make and model just below your signature as many of us have done, so you will get a better answer.