Out with ZEP, but what for best protection and looks?

My previous coach, a 2001 Class C, is for sale at the dealer after trade from second owners. It has a lot of white surface and it has not yellowed at all - never anything but wax. It has never been stored inside - has been in New England most winters and in North Carolina for summers most of the time.
This ZEP controversy will never go away. If you like it, keep applying it, if not follow the suggestions and get it off and wax it.
End of story. We should just agree to disagree and do what works for each of us.