I guess to sum up all of this before it becomes an all out flame war, here is what I discovered.
1. I have waxed many RV's in my life. It is tedious and very labor intensive. But the results are certainly nice once finished.
2. I tried the Zep first on a fiberglass travel trailer that I bought at an auction. It spent 6 years stored outside. No shine, and a chalky
residue on it. It was a mess. That is when I first tired Zep (actually it was Red Max Pro at the time). Same stuff.
I scrubbed and cleaned the trailer with TSP and barkeepers friend on the really nasty parts.
Then I applied the Zep.
1st oat - Looked splotchy Not good
2nd coat - Better but still reason for concern.
3rd coat- Now the shine is coming through
4th coat- WOW!!!!! Better than I expected.
In the 6 months I owned the trailer, I noticed several things about the Zep
1. The trailer did not water spot. I never had to dry it after washing. The water sheeted right off.
2. After retuning from various trips, the bugs while still there, came off easier. Just a sponge wipe an they were gone.
3. I stored the trailer indoors, so I cannot attest to its outside durability. I later sold the trailer for a $1800 profit, in part due to the really shiny exterior.
Using it on my Class A, same results, but the finish was not as distressed as the trailer. I did use it on the roof (fiberglass roof)
and it stopped the chalky runs down the side of the RV. No water spots after washing, bugs came off with little effort. I also noticed it worked well on the black metal trim around the windows. Looks like I "Armoralled" the trim, except that it lasted well over a year. Shiny black gloss.
So, to the wax purests, no harm in doing what you are doing.
To the nay sayer's about Zep, if you have actual experience using the product, please voice your opinions, like I did. If all you have to argue about is the concept / impressions about Zep, you should keep it to yourselves. Why create bad blood with something you have not even used?