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<p>[QUOTE=&quot;gronnh20, post: 4069421, member: 73224&quot;]It may be the pneumatic machinery packaging up the silver coins that is causing the spots.&nbsp; A lubricant moisture mixture from a leaky seal or pressure relief valve.&nbsp; That&#039;s my theory anyway.</p><p><br /></p><p>One night, as I was going through a bag of quarters from the mint, my daughter came into the room and sprayed Frebreeze(?).&nbsp; It didn&#039;t happen then, but, a few days later milky spots came up on the coins.&nbsp; Nothing removes those spots.&nbsp; I tried everything on a few of the coins.&nbsp; Nothing would pull those spots off, short of, a grinding wheel.&nbsp; That was a public service announcement in case you run into a renegade sprayer.</p><p><br /></p><p>I have a 2012-S Silver proof Kennedy in PCGS plastic that has milk spots.&nbsp; I don&#039;t think there were milk spots on it when I was gifted the coin.&nbsp; It has milk spots now.&nbsp; It is graded PR70DCAM.&nbsp; I got it in 2014.[/QUOTE]</p><p><br /></p>

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