I believe on previous related threads I have seen people name products that they claim to be better (don't recall specifics, but a search may bring up the details) but I use Walbernize and am happy with it. I try to do our trailer at least once, usually twice, a year, and have also used this product on our truck and motorcycle.
Seems to do a good job and what I really appreciate about it is that even if under bright sun conditions - which I know are not good for waxing - the dried polish is easily buffed.
I have bought Walbernize at Jackson Centre, but I am sure other AS specific RV places carry it, and I think Walbernize has its own website.
Brian & Connie Mitchell
2005 Classic 30'
Hensley Arrow / Centramatics
2008 GMC Sierra SLT 2500HD,4x4,Crew Cab, Diesel, Leer cap.