Graveyard earth a touch of black and a touch of vomit brown base..highlight up with Kommando K then Bleached bone....
should work...you can also wash down with snakebite leather and black depending which way you prefer working
oh and white highlighting on the tips to give the bleached effect.....in fact missing Bleached bone and just using white to highlight may give an older look..
It\'s weird I paint lots of bone and I\'m always trying different ways of doing it but never really settled on anything....