Made a few more skulls they sell pretty fast and are easy to make I start with a 2d pocket route and finish by hand with chainsaw and die grinders. Then torch it with a big weedburner propane torch.

On these I used a wire brush wheel in a drill after burning to groove out the grain, the pictures do not really do the effect justice.

DSCN3088 by Brian Harnett, on Flickr

DSCN3090 by Brian Harnett, on Flickr

DSCN3093 by Brian Harnett, on Flickr

DSCN3094 by Brian Harnett, on Flickr