Dropkickweasel
Greenie
A few pennies I've found, such as this one, have what appear to be large blisters on the side where the face is. Is this a mineral deposit that can be removed, or has the copper in the pennies somehow bubbled up and destroyed the image? Just want to know if I can clean these lumps off and if so, how? Thanks!
![20181104_120055.jpg 20181104_120055.jpg](https://www.treasurenet.com/data/attachments/1486/1486423-0ae4632a7d2e9c4c8d263c3ffad27e55.jpg)
![20181104_120055.jpg 20181104_120055.jpg](https://www.treasurenet.com/data/attachments/1486/1486423-0ae4632a7d2e9c4c8d263c3ffad27e55.jpg)