I purchased a 2005 2350 that sat out in the Texas sun all of it's life. I got it at a very reasonable price because the exterior fiberglass was never taken care of properly and was completely oxidized. All the plastic pieces on the roof and exterior walls were so brittle that they would crack if any pressure was applied. It took me several months to buff, polish and wax the exterior walls and replace EVERY exterior plastic piece. That includes lights, trim, skylights, covers, gutter spouts, window/door gaskets, power receptacles and redo all the caulking. I also had to remove/replace the vinyl graphics that had cracked.
The one thing that was in perfect shape and required no maintenance was the fiberglass roof. It was in perfect shape and easily maintained its strength while replacing every plastic piece that was screwed/caulked to it. The roof didn't show any of the oxidation effects that the exterior side walls did. I simply scrubbed it with a brush using with soap and water and it looks brand new.
