Use rubbing alcohol - take a q-tip, dip it in the rubbing alcohol, and rub at the dried glue until it softens. Then wipe or rinse it away.
ANS 2 - You can NOT successfully remove superglue from any plastic. It almost always mars the surface.
Isopropyl will remove only elmers glue from plastic, not super glue. once it gets on there, you can't remove it.
Anything that could remove it could also damage the plastic.
acetone nail varnish remover
Any super glue will bind hard plastic.
I go super glue on my wedding ring with diamonds. How can I remove?
There is almost no way to do this without destroying the plastic. As you didn't say WHAT KIND of plastic, it's hard to be more help.
try super glue or go to a auto wrecker
You can't remove Super or Krazy glue from fabric.
You cannot remove super glue from most fabrics without damaging the fabric.
if it is a plastic model kit you can use super glue, but not wood glue.
Of courseANS 2 - Better to epoxy it as the gas may act as a solvent on the super glue.