No help on ZEP; I've seen too many posts about this flooring stuff yellowing on the trailer and having to be removed to reapply in a few years.
However, if you'd like something so slick the bugs come off easy, is simple to apply (no buffing needed) you might consider a polymer coating instead of a wax. I've been using Rejex - used on boats and airplanes - for many years.
Not cheap, but it does make maintenance a lot simpler. RejeXģ - Official Site