This denarius had some on it too, I forgot to take a picture but even from this you can see that it looks like its been harshly cleaned in some areas, and thats where it came in, so maybe it had it before? Anyway some acetone took it off really easy. Now I just want to try and prevent it from coming back. I've already put some silicia packs in with them... Would verdi-care be right for this? Or something else? Also, what is it? Bronze disease? Or from pvc maybe? It didn't seem as crumbly as the bronze disease that I've seen before... Thanks!