Where I find zinc is: hot wheel cars (sacraligious if you scrap them), the metal emblams on BBQS... They appear to be aluminum, but are zinc, door handles on screen doors, some lawn mower gas tanks, some lawnmower (mostly lawn boy) frames, flex fittings on gasoline/diesel gas pump nozzles, chain saws that are made of metal cases... I can find more examples, but don't have my bucket in front of me.
Zinc and aluminum are similar in color.... easiest way to tell difference is, get something similar in size to the zinc piece in question and zinc is the heavier piece.
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