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Message:: [QUOTE="-jeffB, post: 7389840, member: 27832"]No, no, not dip (EZest) for PVC damage, and generally not for circulated silver like this, period. Silver dips remove tarnish, but they'll leave circulated coins with an unnatural color/texture. If you want to try it, experiment with coins you don't care about first. "Active PVC" deposits are lumps of soft-to-liquid organic chemicals containing hydrochloric acid. To get rid of them, you want an organic solvent. Acetone is the go-to solvent for this. You can get it at Walmart or your hardware store. Put it in a glass or polypropylene container that you can cover tightly. If you don't have a container with a lid, put aluminum foil over it, and seal it tightly; otherwise, the acetone evaporates quickly, and the vapors are flammable. Let the coins soak for an hour or two, and see if the deposits are gone. You can let them soak for hours or days if you need to. When you take them out, rinse them with acetone, then stand them on edge or put them on a soft towel to try. Doug ([USER=112]@GDJMSP[/USER]) recommends a three-bowl process: soak them in one bowl of acetone, then dip them in a second bowl of acetone, then dip them in a third bowl of acetone. That's probably more effective than pouring acetone over them, and it's safer and more efficient. Each subsequent bowl greatly dilutes the residue from the previous stage. By the time they come out of the third bowl, they're ready to drip and dry.[/QUOTE]