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<p>[QUOTE="Kentucky, post: 3443252, member: 33176"]No. Mineral oil is a hydrocarbon and will not break down. However it will evaporate slowly over a long time and a mineral oil treated coin might cause a coin capsule to discolor. I am intrigued by linseed oil, which will not dry, but will cure with the oxygen in the air to leave a plastic coating over the coin (linseed oil is what is used in "oil" paints).[/QUOTE]</p><p><br /></p>
[QUOTE="Kentucky, post: 3443252, member: 33176"]No. Mineral oil is a hydrocarbon and will not break down. However it will evaporate slowly over a long time and a mineral oil treated coin might cause a coin capsule to discolor. I am intrigued by linseed oil, which will not dry, but will cure with the oxygen in the air to leave a plastic coating over the coin (linseed oil is what is used in "oil" paints).[/QUOTE]
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