hi patriot, first u clean all the hair off, and as much meat and membrains as u can, then boil the head to soften the rest off the tissue,u only boil for a few hours. then i take a sharp knife and scrape off as much membrain as i can, then i use a roto tool with a copper brush and clean the rest off, this works really well.then let the scull dry for a few hours, when it is completly dry u then brush on the acid and let it sit always put it in a plastic bag. u may have to put on more than 1 coat on, when it is done it should be clean and white! good luck!