I've read a few ideas on this both the skull and the antlers. Some say leave it, some say polyurethane, some say mop and glo.
I put a light coat of Mop and Glo on one skull recently and it looks pretty sharp. I played with it a bit on some burner skulls and found 2 coats was just to much. I'm happy with this tactic.
But now the antlers look dull and faded next to the slightly shiny skull. I believe I read on here at some point in the past that guys rubbed their antlers with WD-40, does that ring any bells? I tried it on a couple sheds and it actually looks pretty good. Any long term issues with this that I'm not considering? It would seem the oils would protect and even give the antlers some natural luster. Also, a light coat might protect from dust and overall grime?
Any other suggestions?