I was lucky enough to find a buck skull from a road kill buck that was killed after he had shed his antlers and I used the skull to mount a matched set of sheds to, I have found 3 years worth of matched sets of sheds from this paticular buck.
I drilled holes into the pedistals and drilled holes into the bases of the antlers to attach the antlers to the skull and used plaster to fill around the bases of the antlers( will never use plaster again, live and learn ) I then smoothed the plaster while it was still wet and then sanded, painted the skull with white acrilyic paint and sealed the skull with a polyurethane varnish,I also seal the antlers with a lite coat of varnish and decorated with deer leather, sterling silver,mink fur, eastern turkey feathersetc. It was fun