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Try freezing the knife and then giving it a light whack.
 
+1 on boiling hot water. here is a humerous story for another way to remove epoxied on scales.
i had a customer find out the hard way (easy way to remove epoxied on scales) that you do not leave a custom made knife laying around dirty so your daughter can stick it in the dishwasher to clean it. needless to say the epoxy came loose when it ran through the sterelize cycle. it was a pinless tang knife which is why they came off. luckily i was able to put it back together for him.
 
Last one I had, I froze and tapped. The scales did not come off immediately, as the tang was skeletonized and I think the epoxy going all the way through made it tougher.

I re-froze it, took it out and beat the piss out of it on the bench and with a wood hammer, then reached over to the bandsaw where I had some little slivers of cut-off TI that made good little wedges, and began opening the seam by lightly tapping the wedges in and leapfrogging them. (After smoothing out the tips of the wedges with 220 on the belt sander.)

I was able to save all the materials, including the fiber liner and mosaic pins, and glue back up with minimal re-working.
 
+1 to boiling, drop it in there for a couple of minutes then prise off with a wooden wedge, works a treat and wont damage the micarta.
 
Don't forget to oil the blade if it's carbon steel, or it will rust. Or you could stick it in the oven at 200 degrees for 10-20 minutes, should give the same effect without rusting.
 
Hmmm, how well does that work if you use Loctite Depend 330. The boiling water, I mean. The spec sheet indicates that it should still be holding very well at that temp.
 
Keep the blade in a pan of water (half the knife is immersed), blowtorch the tang until the micarta starts to burn, then dunk the whole knife. The rapid cooling will cause the scales to pop off the tang.
 
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