the aluminum from coils is 1100 finstock if you have it in quantity and clean you can get a nice price for it. of course no one has it in any real quantity so everyone is pretty happy with old sheet price, but if you can get it in quantity you can get terse price at a large yard
foil allows 5% organic residue Cans allow 0, and normally 2% moisture... Cans are cleaner then foil!
pet foot cans are line with plastic pray for old sheet, expect breakage
the can spec(UBC) for cans "talc" requires . "The material is to be free of other scrap metals, foil, tin cans, plastic bottles, paper, glass, and other non-metallic items"
otherwise its not cans better yards will warn you they don't want cans in the old sheet too many cans in the old sheet make it breakage.
if a yard is giving you #1 Cu for rad tubes you should be happy as a lark, they are number 2 unless they are cleaned. that white residue is aluminum oxide, and it plays hell with copper in very, very small amounts. be leery of any yard giving you #1Cu they are underpaying, or some day they will suddenly change their tune.
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