my way would be "rp7x" He can make a cement block look like chrome.
i have polished a turd before
Same thing but I wet sand with 400 and finish with 1000ish just to smooth it. It will take too long using all that fine stuff. Then I have been using the mothers powerball and using rubbing compound then mothers chrome pollish and it turns to a work of art. I would like to find a better pollish that works quicker. I worked for a guy that had me pollish an alluminum semi trailer and i used a pollish that peterbuilt sells and it worked great, too bad I cant find that.i wet sand my tunnel with 1000 grit then 1500 then 2000 then i use autosol,the idea is to get the aluminum free of scratches and high and lows !!
then i just maintain the tunnel with the autosol every few times out!!works great ,mothers cant hang with this stuff ,ive tried it all!!
http://www.amazon.com/Autosol-Classic-Metal-Polish-Paste/dp/B0019FE21I
White Diamond. Here's their site. I think its available at some auto parts stores. Check site for info.
http://www.whitediamondamerica.com/