Cleaning / waxing the Class B fiberglass top

UPDATE: yes, I believe just oxidized, no need for paint. I became much more familiar with it yesterday, and have more work scheduled for today. I ended up giving a try with things I had on hand, and I can always follow up with other methods as I read more, and check some of the products suggested. I have done some basic washing and rubbing with shop paper towels to get a lot of the loose oxidation off. Then I scrubbed with a clay based cleaner (Bio Cleaner, which my wife had on had) and a lightly abrasive sponge. That worked wonders, taking off black spots, dirt, and discoloration. I finished with car wax. I think for today I will try a second wash after rinsing, before waxing. I will definitely check out the products recommended, but I needed to work promptly this weekend, because I decided the cleanup was necessary to look presentable!