years ago, my wife got into beast skulls. she called a rendering plant in graham, and they had a horse head that was supposedly fresh/frozen. when we got there, it was not frozen, and was nt' rotten, but deffinatley not fresh. they put it in a black trashbag, thru it in my crappy 74 nova hatchback(350/4 bolt/m22) and off we went. when we got home, she tried to skin it, then decided to boil it, in the apartment, in the kitchen.
cooking it worked, but it needed dry heat to get the oils out of the the bone so it wouldnt rot, so, she put that in the dishwasher.
when it got hot in there, it stunck soooo bad, we tried to cover the smell with fresh rain scent airfreshner. can after can, aftercan. the smell of fresh rain air freshners make me gage , still.
turned out cool, occasionally we spray it in white sprimer for touch up.