I enjoyed the article on extracting a coin or medal from an acrylic block. I've been reasonably successful in removing coins, medals, tokens, etc. from acrylic blocks by doing essentially the same thing: freezing the block for a day or two, then having a hammer and something solid nearby, taking the block out of the freezer and hitting the edge of the block hard with a hammer. This generally removes a big chunk of the plastic and exposing the item inside. If it doesn't, then I hit it again until some part of the item is exposed to the air. I then heat of a pan of boiling water and carefully drop the partially encased item into it. Since most of the encased items are metal, the metal expands faster than the plastic, and the rest of the plastic easily comes off. Of course, if the item encased in the acrylic isn't metal, this might not work as well, but still worth a try. Hope this helps.