The only way to remove epoxy is to use Dremel. From time to time I see silver Ottoman crossguards on eBay. But yours has langets that fit the slots on the handle, and a new one will likely not. Stay with what you have.
For a complete restoration you will also need to find or fashion new tear-drop eyelets on the pommel. Much more difficult to accomplish than buying a Dremel tool .
Or just make peace with kisses of time.
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