Depends.
Pop cans - poor .
Aluminum wheels/pistons - good
A lot of what looks like aluminum may be zinc or pot-metal.
I’m not a purist , I melt in steel crucibles , I’ll mix up and melt whatever , but I value my time so melting 500 cans to throw 70% away (paint/impurities etc) isn’t worth it
I had a lot of friends in the trades bring me home good scrap from job sites.
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