Zinc, Chrome, Cadmium, etc., lots of the coatings on metals are "heavy metals." You can ingest them in dust form or metal fumes. They accumulate in your organs and never leave. Milk and Milk of Magnesia are probably old wives tales and won't do anything for you because you got the metal in through your lungs, not your stomach. Grinding indoors will leave the dust all over your shop and clothes, then you can share it with your wife and kids. Sound good so far?
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