I don't like how a knife I am making is turning out. It is a stacked leather with antler handle. I want to remove the leather disks and pommel but they have already been epoxied....

How can I remove them to start over?

grinding wheel and precaution... or torch heat and the epoxy will loosen.. be careful

You might try putting it in a freezer for 48 hrs and then rapping it with a plastic mallet. This method was used to remove gun actions for stocks when not correctly coated with a release agent before bedding. Total time invested less than 10 minutes.

Either heat or extreme cold will break down the epoxy but remember, it will also break down the epoxy under the antler. I'd just grind it all off and start over. Been there!