Any way to restore shine to fiberglass body

What year is the unit? If it's older, I would use the Zep/Red Max Pro process.
After you get it cleaned and the oxidation removed, USE THE WAX OF YOUR CHOICE.
Some don't like to use floor wax on their rig.
It did a nice job on our 96 Southwind.

Takes lots of elbow grease too.

There are a lot of products used in the fiberglass boat industry that would work. I used Poly-Glow on my previous RV. Lot of hard work using the stripper to get all the wax, grime and stains off, but it did remove the oxidation. (The stripper comes with the Poly-Glow kit.) After that you apply the Poly-Glow in multiple applications - it takes 4 or 5 before it really starts to look great. They claim it lasts for a year or longer on boats that are subjected to direct and reflected sunlight.

It’s a 2013 winnebago

I also recommend use of the Zep/RMP - worked wonders on my 92 rig which still looks better than some of my friends newer rigs. You do have to do the prep work as outline in the previous post but that prep work was easier than other alternatives.

Harbor Freight get a dual action polisher (don't forget to use your 20% off coupon) watch a few videos on you tube by auto detailers. One even does a test on the Harbor Freight polisher. Then use Meguires Flagship cleaner wax.

Buff & wax...standard stuff, just lots of work and once it's been allowed to get chalky, you will have to do it more often to keep it under control.

Is it gel coated? if so the Meguiar's Marine/RV Onestep works great. I use a DA buffer for it and follow up with Starbrite Polish a opposed to wax. Wax looks nicer but doesn't last as long. Not easy but it works.

valhalla360 wrote:
Buff & wax...standard stuff, just lots of work and once it's been allowed to get chalky, you will have to do it more often to keep it under control.

X2

If it is really bad a simple cleaner wax is not going to do the job. Go to a marine store or an online marine supply store like defender.com for products like 3M compound specifically made to restore chalky neglected gel coat. No there is no easy way. Neglect takes work to bring back