I use 3M #3 rubbing compound and a variable speed buffer I wheel the entire coach until I get that like new finish at this point you need to seal the shine and I use Gel-Gloss to do that. It is a product made to specifically work on gel coat finishes. The Gel-Gloss needs to be reapplied after about 6-8 weeks but it is a simple wipe on wipe off product. My 22 year old MH shines like the day it was new with no wax on it so I have brought it back to the original finish. I have used nu-finish in the past with good results doing the same thing. The wheeling out only took place because I used the Red Max and after 2 years the coach started to yellow. I had to get the s**t off and the finish back it was a big job.