I purchased this 9-2022. Did our 2 vehicles, manually, neither is a coach, and they still have great protection.
https://washwax.com/products/wax-all-hybrid-multi-polymer-ceramic-wax-32oz?_pos=2&_sid=3d00e65d4&_ss=r
Folks at Washwaxall advised me to go over the vehicles after i did it with;
https://washwax.com/pages/rv-polishing-wash-wax-all
which i did. It cleans up all the residue left from prior process and seals it.