Who Makes This Album Style?

Not my image but it should give you a good idea of what PVC residue looks like, the green starts forming on the high points that are in contact with the PVC flip and continues to spread to the rest of the coin. If caught early enough on a silver or nickel coin, it can be remedied without permanent harm to the coin but I have never seen copper recover after PVC residue is removed. If left too long, the residue will start pitting the surface- now you have an impaired coin. PVC residue can be removed with organic solvents but you must thoroughly rinse the coin after soaking to remove any residual contamination.

This is what happened to me as well,exactly the same green slime.I salvaged what I had by soaking in olive oil and soapy water. Now from knowledge gleamed here, I would try a acetone bath. Mine came out pretty good, pennies, not so well.I have the bulk of my collection in guard master, ok but I like Uni master because you can edit the titles.