This is just for information purposes. one of my projects was bull elk euro, nothing out the ordinary..............except, it had scraped all the velvet off in a burned area. The antlers were very rough and filled with blackened pine. client wanted it preserved so i said ok. well, didnt take long for moisture to loosen things up and overnight the skull was damaged. i had taken plastic, wrapped tight around and under the burrs and tied off but it obviously did not work. i have used everything at my disposal to remove the stains. although they are milder now, its not acceptable. there is nothing left to do..........any more soaking and whatnot will only make the skull degrade further. so, client is coming to see it, i have never painted a skull before but this may be the only choice if he wants it white. for the future, i will hose all the wood and bark and dirt off as usual. go figure........hope this helps someone.