I repaired a completely shot up elk with the following fix; first I rounded up several shot up medium deer front leg sections. I cut round holes in both sides of the elk to remove all the shot up foam. These were about the diameter of a basketball. Next I cut the same size round plugs from the rear portion of the shot up deer, these had few or no holes in them. I mixed a little Magic Fix and glued the plugs in place with it, leaving the plug surface about 2" below the outside of the elk's normal side surface. I then mixed enough patch material to cover the plugs and bring the surface out to the targets normal contour. After the patch material set I rasped it to even out any high spots, marked the scoring rings with the proper size circle and cut them with a dremel and grinder. A little paint to match the patch to the rest of the elk and it was ready to go. After my fix this elk was shot for 5 more years in a bunch of wheelie tournaments and was still score-able when the club that owned it folded. Magic Fix is pretty expensive and the plugs cut down the about needed for the fix by about 75%.