Lead is prone to deterioration when exposed to moisture. Here in California that isn't a major issue, but humid days do occur. Also, there is the safety issue, since lead is quite toxic, especially for children. So, I am considering applying Renaissance wax to seal the coin. The wax would seal the coin, at least theoretically, from the effects of moisture, and it would form a barrier of sorts that would allow safer handling of the coin. Is that advisable? How much will the wax alter the coin? The wax is also a polish. Would that cause the deposits, which I think add to the coin's appearance, to dissolve or darken? Thanks! The coin weighs 15.77 grams, and is 24 mm in diameter.