I've had more time to test Nuvite v. California Purple polish and I've changed my mind. The latter product is quite good.
However, I would suggest for RVers not to even think about using the purple without using the green aluminum deoxidizer first (step 1).
It's principal job is to maintain an existing polish. Nuvite is still vastly superior for reaching a maintainable polish in the first place. California Purple does not remove small scratches.
So, yes, you'll still be compounding parts of the plane, but I was able to brighten up half the plane yesterday with just the Purple. It's a real time saver and provides a respectable finish.