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Message:: [QUOTE="TopcatCoin, post: 2809074, member: 22746"]I would ask [USER=4781]@dcarr[/USER] what he recommends.  Here is what he posted on another forum: "There is an effective and safe way to mitigate the toning if you are interested.As long as they are not heavily toned, a "dip" type cleaner will take care of it, if used properly. I recommend this procedure: Get a black plastic bottle of "Tarn-X" silver cleaner (available at Walgreen's) or any similar "dip" type cleaner.Submerge the medal in the cleaner for about 15 to 30 seconds. Then rinse it completely under the tap (including the edges) and then pat dry with a clean soft cotton bath towel (never rub dry, only pat dry). This type of "dip" cleaning will not harm the luster (or even a hologram), so long as it is done properly. This will also work for relatively light toning on mint copper, brass, nickel, etc. You can re-use the cleaner on other medals and coins. But note that if you clean a lot of very dirty tarnished silver coins the cleaning solution will eventually turn yellowish. You can still use yellowed cleaner on silver coins. But if you put a copper piece in yellow solution, it can plate silver onto the copper."[/QUOTE]