Hershey beat me to it, but I agree that if someone had to remove the Zep/rmp then it wasn't applied correctly in the first place. In my case, my fiver was moderately oxidized when I purchased it used. I tried for 2 years to get a shine on thethe cap and back, using various waxes, oxidation removers, buffers, rubbing compounds, etc. without lasting results. After seeing pictures of results of red max pro (now Zep) I decided to try it, preparing the surface meticulously and applied 4 coats of rmp. I'm on my 4th season with it and have done nothing but wash it. It still looks much better than anything else I tried previously. It is due for a refresher coat or two.
I'm not trying to convince anyone; only sharing my EXPERIENCE with it. I've seen how it looks on my fiver. If you've not done the process or seen the results you really have no basis for knocking it. If your finish is in great shape and looks good, then obviously there is no reason to consider the process. Stick with your wax. I would too, but my finish was damaged, and it sounds like the op may be in a similar situation. Better to go with experience instead of 'heard from a friend of a friend the stuff is no good'.