SHED RESTORATION...

Hey guys,
I am looking to restore a shed that was found in Utah this year. The shed itself is roughly a year old, possibly two, it has several hair line cracks and a few deep cracks, and a cheater that was busted off that will need to be filled and sanded. I am trying to figure out the best way to fill the cracks and restore the antler to a natural color. Any advice with materials, techniques, or tricks would be much appreciated!