Falcon:

Neither a hair drier nor a heat gun will do. Whip out the old soldering gun, lay the point directly on the pivot point and wait 20-30 seconds. Grab the free end with a pair of pliers and wiggle it. If it doesn't come loose heat it some more. You will get them out this way. If the control surface is still attached it's a little harder, but it will still work. But only metal hinges in epoxy or similar glue.

Bill.