ORIGINAL: MinnFlyer
Not a problem, put a few drops of acetone right on the pin and work it in. Follow it with enough acetone to flush out some of the loosened CA. Then add a few drops of penetrating oil.
The Acetone won't be able to travel very far at all into the slot holding the hinge, and even if it does, once it evaporates, the CA will re-harden.
Acetone and plastic isn't a good combination. The acetone will attack plastic and weaken it. If you already used it, check your hinges every flight. If I'm not mistaken many plastics will become brittle over time and start to break down. You must keep a close eye on the hinges for awhile.
If you haven't used acetone yet, try to pop out the CA around the hinge with an exacto being careful not to cut the plastic. It will take awhile then use vasiline and keep working the hinges.
If you have a gap, just seal it with clear covering or clear packing tape. I use vasoline on the hinge to prevent the adhesive from setting in and causing problems. This should work for CA or Epoxy. I've always used 30 minute epoxy for hinges unless I use CA hinges designed for CA specifically.
You may cause more problems trying to cut out the hinges and redoing them. It really depends on how bad it is. Do you have pics?
LLD