What polish product to use

I am going to take delivery of a 2011 30' International Serenity. I bought it as salvage and Airstream Northwest is replacing the damaged parts. There is some oxidation and scratches on the aluminum. In doing research, I found three products recommended. Walbernize is frequently mentioned but it appears to not last too long (but easy to apply). Glare is supposed to last a year but seems to take more effort to apply. Then Griot's Paint Polish is also given good reviews. Does anyone have feedback on these and also how much of the product will I need? Thanks! Rick Todd