If you used epoxy then use heat gun. It will soften the epoxy and the hinges will pull out like nothing! If you used wood glue you might try water to dissolve glue.... or a similar method... if you used CA you can try saturating the area with acetone to dissolve the CA. A cloth soaked in it and laid onto the surface might do the trick. Otherwise, the hinges will just have to be cut out. If you have to cut them out make the cut outs all the same and make filler blocks to replace the cutouts. I have made the blocks using my Micro Lux table saw which allows very precise cutting and is easy to set up for multiple parts to be duplicated- perfect for this app. I would make the blocks first then use them as a 'pattern' to make the cutouts. You are removing the covering anyway so this method of repair works very nice with minimal sanding.