I was watching another youtube video where they were re-winding the stator on a large motor. They used an oxy/acetylene cherry blossom heating tip to burn the windings before stripping it. I suppose you could use a flame thrower powered by a propane BBQ tank to do the same job. You would want to do it outside though. All around ... not much fun any way you do it. It would be one thing if the windings were varnished but epoxy would be extra hard to deal with.

I hope it goes as well as it can for you.