Annealing (heating) will help soften hardened alu, how easy this will be on a drinks can, I can't really say!
Sounds like steel cans are the better way to go, but I'm still interested to try annealing the alu cans to see what happens.
@cyclotron3k started
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Annealing (heating) will help soften hardened alu, how easy this will be on a drinks can, I can't really say!