Advice on buffer pads and wax needed

If your FG is highly oxidized the Starbrite product has a lot of cutting compound and works well at least on boats. One word of caution boats generally have thicker gel coat than the sidewalls of a MH. It is easy to burn through 10 mils of gel coat and expose fibers with a buffing wheel and Starbrite. I would start with the Maguires compound sold at HF and use their buffing pads also. The lighter compounds take longer to remove the oxidation but is safer. If you take a small area and rub that area by hand with a cleaner wax and the shine comes back the Maguires or any compound or cleaner wax will work well with a buffing wheel. Some MHs have Filon side walls like mine where you can see the fibers through the gel coat. This will be a lot of work and if you have good shoulders will be worth it, if not the Zeps treatment works well for older highly oxidized MH's.