Dissolving Epoxy
Ordinary Methylated Spirits (called Denatured Alcohol in USA), but -
it takes overnight,
very flammable.
Acetone will dissolve epoxy, but -
it is slow,
very flammable.
not good to breathe the fumes.
Methylene chloride will make quick work of it.
It is not flammable.
But - it will dissolve just about anything else it comes in contact with of an organic nature, wire insulation, most plastics, and especially skin.
Also not good to breathe the fumes.
Heat works well for destroying epoxy. The epoxy gets crumbly and can be brushed away. It takes about 177° to 182°C (350° to 360° Fahrenheit) to do it.
But -
will the item you are trying to remove the epoxy from take that temperature without harm? Lower temperatures will weaken epoxy perhaps sufficiently to get the two items apart. It will then be a matter of cleaning the epoxy off the items if necessary.