I would say to each their own on this one. Having said that, I applied RMP on the front and rear of my motorhome and keep a good coat of wax on top of it. To me it keeps the RMP sealed and I am hoping that it will provide UV protection and in return delay the yellowing and aging of the RMP. Wax goes on and off easy. It may not do anything for the long term protection of the RMP but it makes me feel good! I have had the RMP on the motorhome for quite a while and so far I have not re applied and it still looks great.