I tried to use Meguiar's flagship on my RV. It took lots of work and elbow grease to get a blotchy looking finish. So I tried a second coat with the same results. In one area, I even tried a third coat with no improvement. I then stripped off the whole mess and used ZEP.
Polymer or not, the Meguiar's was difficult to apply and required a cloudy day or the dried wax film was hard to remove. Rubbing on the wax, allowing it to dry to a haze and then removing is a lot of work. It is all but impossible if the RV surface is hot or in the sun.