[MJC4]

Airborne,

I use a two part epoxy resin to attach the carved toppers to the staff on my walking sticks. I have also used it to secure a compass on one stick and a thermometer on another. I would think it would do a good job of securing medallions as well. Attached pic is of a topper attached to staff with clear epoxy.

 

[MJC4]

My bad I misread your original post you did say embed a medallion not attach it. Both the thermometer and the compass I attached to sticks were set in the top by drilling with a spade bit. They were not completely encased in the resin.

It's an interesting concept you are working on, would be interested to see pics of your progress.