Oxidation is usually under the clear coat and is in the paint not the clear. So trying to get rid of it is near impossible without a full removal and repaint. In some cases where there was no clear, or it has worn or deteriorated to the point that the paint/gel is exposed some form of compounding/waxing/ polymer can restore a shine for a short time but not for very long. I know that some have talked about good results with one product or another but the fact is if the problem is under the clear, you cannot get to it to fix it. You polish the clear, which then looks nice, for awhile.
I have one of the 2011's that had an issue with the gel oxidizing. I had it repainted and new decals. Then I dropped the trailer on the truck bed rails which caused damage to the fiberglass of the cap. It was done again, but now I am working with the repair shop because after less than a year, the paint is oxidizing under the clear. It cannot be fixed without a complete redo and the shop is having the paint manufacturer foot the bill because of their defective paint. So bottom line. If it is in the gel/paint and under the clear you will not fix it with some king of polish.