TOPIC: How do I rescue a faceplate medallion???

I'm looking for ideas - proven or humorous - on how to safely remove one of the oval plastic medallions from a damaged faceplate so I can use it on a nice faceplate???
I know NYMarine has after-market ones, but I'm hoping to keep the depth & patina of an original medallion.
Thanks in advance everybody!
Thom

heat the back of the faceplate till it stinks, at this point you know the adhesive is soft and almost melting , using dacron fishing line (multistrand fine line)in a sawing motion back and forth under the emblem pressing towards the metal faceplate
the
I have used both silicone and shoegoo to glue them back in place there will be a smooth layer of Mercury adhesive still on the emblem ....leave it there

I did my last one with some nylon thred cold and it came off with little dificulty, but I bet the heat makes it easier. First one I did came off with a twist of my wrist.. it was a rather corroded face plate. I have only done two so Eager to hear other thaughts as well..