Greetings,  I remember hearing that acetone is used to remove CA glue
(crazy glue) so this may work on PVC-E.  There are products that soften
epoxy, which should be strong enough to remove almost anything, but the
active ingredient is something awful that I would not want to be near.

Best regards,
Spencer Chase
Laytonville, Calif.
http://www.spencerserolls.com/