Tarnish has appeared on some of my silver bullion.  I bought some candian silver maple leaf some time back and used my bare hands to handle them.  I thought that the oils on my finger ruining the coin was just superstition by those crazy coin collectors.  After all, we handle coins everyday and I don't see the normal 10 cent or 20 cent coins getting spoilt. To my horror, I discovered some white stains on my silver coins which were very clearly in the pattern of my fingerprints.  Tried wiping them off with a cloth but to no avail.  They don't see to come off.  Now my shiny coins are "stained" by the white marks. Anyone has any idea how to remove them without spoiling the silver?...