Using ZEP was one of the best decisions I have made. If I had a new RV, I would also use it immediately.
When it comes to a high gloss, mirror finish you cannot beat a gel coat with best hand rubbed coatings used by the show car guys. Of course those finishes are lots of work and are for show cars which will be stored in a garage.
ZEP is an acrylic floor finish so that is the sort of shine you will get. The finish will shine but by comparison to car detailing it will be very slightly dull and hazy.
There are many advantages to ZEP beginning with very low cost and a really, really long lasting finish. I have done some maintenance but I am now on my 6th year with my original ZEP finish. ZEP continues to seal the surface and protect against oxidation.
Last Spring my 5 year old ZEP finish cleaned up with virtually no work. Late in the Fall, I returned from a 15000 mile trip with a bug splattered RV. Fall leaves and gunk landed on the roof and rotted. It sat all winter and looked really dirty when I went to do the Spring cleanup. A thorough spraying with the hose was all it took. There were not even any black streaks to clean up. I did have to use soap and a mop on the nose of the RV to remove the last of the dried on bugs. Once the RV was clean, I used a rag lightly dampened with ZEP and wiped down the entire RV. That took about a half hour most just moving and going up and down the ladder. That is it for another year.
I should mention one downside you will read about if you do a google search. The ZEP finish will not look good and can flake off unless you remove the old waxes. I did a thorough cleaning with dilute ammonia. In fact I did that twice before applying my initial coat of ZEP.