Are you saying you had the entire thing buffed, or you talking about just the front cap?
We have the same 5th wheel. It is a total POS regarding the finish. Mine sits outside and the south side will oxidze within 4 months. I have literally about killed myself trying to keep it looking halfway decent. I've tried all Meguiars producets, Starfire one step, anything anyone suggested might work. I bet I have $500 worth of polishes and waxes.
The only thing I have found that works for me is 3M Marine Fiberglass Restorer and Wax from Amazon. It is a mix of compond and wax. I have been using a Porter-Cable random orbit buffer with a twisted yarn wool pad. It gets heavy quick. I found that my little cheap 6 inch $30 random orbit with a microfiber over the foam pad works pretty well on less damaged areas. I have all the different color Chemical Guys foam Hexlogic pads but the wool works better for me. If you have an area that's not too bad the old reliable Meguiars clean and wax (dark red bottle) will work. I have gone over the trailer with Klasse one step (red bottle) but really can't say it helps.
Good luck with it. Take a handfull of Ibuprofen with a bourbon chaser, then a hot bath after. May as well line up a massage as well.
The front cap is not a problem for me. Only issue has been what looks like mountains decal that developed some mildew on it. All my decals are good. I used that 3M on them and no problems. Actually I'm about to go out and put something on the cap. Probably the red Meguiars with a spray of Carnuba wax over that. Leaving for a road trip next week.
If there is a new one it will be full body paint.
2018 Ram 3500 CC LB DRW 4X4 Cummins Aisin Laramie Pearl White
2018 Landmark Oshkosh
2008 Bigfoot 25C9.4
2014 NauticStar 21 ShallowBay 150HP Yamaha
2016 GoDevil 18X44 35HP Surface Drive