I saw a company at a gun show here in Dallas once that does something similar, although not that intricate, on skulls. But they include in the engraving the date of the hunt, location, caliber or weapon, etc. It looked pretty cool and if I get a nice big hog skull - I'll probably let them work on it.
Be calm brother, I see you and thank you. Your spirit and body nourish mine. Be calm brother; I see you and thank you.