Use 3M heavy duty compound ( available at O'REilly's) with a variable speed buffer ( Available at Harbor Freight for under $50.00 ) This will bring back the gloss to the worst oxidized surface. When you get it shining then you put a sealer on it many use 2001 or Nu-finish I use Gel-Gloss. If you want the finish back you must buff it to get the original luster. I tried the red-max but ended up taking it off. There is no comparison side by side tho the original luster. You must use a lower speed on the buffer or you can burn the finish. I think about 600 rpm will keep you in the safe zone. It is not that bad to do.
