How heavily is it oxidized? If it's only moderately oxidized, you can restore it pretty well with a buffing compound on a buffer and a wool pad. I warn you, though, it can be a LOT of work! I just got finished buffing our '04 Itasca Sunrise which took four FULL days. I need to polish and wax mine as well but I went over it with a spray fiberglass cleaner/wax when I got finished buffing it as a temporary measure which hopefully will last until we get back from a quick trip to Texas in a couple of weeks.
There are a number of videos online
which cover the details.