For the pre-wax cleaner and Sealant I used Auto Magic products (they are distributed here in Moncton at a high end detailing shop called Auto Indulgence. Cummings Auto Indulgence vehilcle detailing centre
Mcguire's and Mother's (also Eagle One) all make similar products.
For the wax this time I used Turtle Wax paste wax (LOL only thing I had left in the garage last fall) and it worked fine. It will wear off quicker than others but the sealant is the most important step......ANY paste wax used after the sealant is applied, tends to work better than just wax alone.BUT
The best ones out there are the marine based products. The one Iggy shows above probably has Teflon in it if you look at the ingredients. If possible try to find one with it in there. My family had boats for decades here in the salt water and it was my spring and fall job as a student to wax their hulls. At one point you could actually buy TEFLON liquid wax in a bottle direct from a sales rep. It helped keep the marina crud off the bottom of the boats.
I find the orbital buffer to be too inefficient if used flat against the side of the RV. You have to angle it to get the buffer to penetrate deep enough. I use it only to apply. Great to use with the CLeaner and the Sealant......that's where you want to dig in and then fill all the pores and cracks. For removal I use 2 separate buffing towels. One to go side to side, the other to up and down. Sounds crazy but it works. Buffing the sealant is 5X's harder than the wax.
Also don't forget to clean and then add a quick dash of wax on the inside/bottom lip of your slides. Just like the doors on your cars, this is where water will always pool. It lays here in the folds and screw holes. A touch of wax here will go a long way in keep water from getting in under where it shouldn't.
I've got a new RV on it's way from Michigan and I can hardly wait to spend a day or two with this process. Nothing better than doing the 3 step process on a new unit. Keeps it new for a long time.