If the gel-coat was not maintained with regular washing and waxing,
about the only solution is a new paint job.  Repainting in Mexico is
about 1/2 US prices.
http://groups.google.com/group/rec.outdoors.rv-travel/browse_thread/thread/5bcd7
17237b4134f/8024c2bb54e0772a?q=Algodones+bodyshop+group:rec.outdoors.rv-travel#8
024c2bb54e0772a

Tom J

A complete repaint is one solution, as Tom J said. The neglected paint
on my rig came up by buffing out the oxidation. I found this out when
I had some body damage, and the guy who did it buffed out the area
surrounding the repair to where it looked like new.

This job does require LOTS of elbow grease, a good quality buffer with
plenty of pads to rotate and reclean, and the right buffing compounds.
I tried to do some of the areas on my rig myself, but was unable to
obtain the consistant results obtained by the guy who knew what he was
doing. (I got too many swirls among the part that looked good.) If you
decide you want to try this route, let me know with another post and
I'll go look up the numbers for the polishing compounds.

HTH

Don M -