Well, I never actually boil the skulls, just bring them up to about 190 degrees or so until the meat falls off. That takes about 3 hours... sometimes longer. Then it's about 1/2 hour with dental pics cleaning up the exterior and interior. And then the clorox is mixed 50/50 with tap water. After drying in the sunlight until bright white, I spray the skull with fixer that's used to fix chalk drawings on paper... I think it's a light grade clear lacqur. And, sometimes some of the teeth have to be glued back in. Anyway, they look good, almost like the ones shown on this thread. One of these years a big blacky (600+ lbs) will come into the yard, big enough to spend a few bucks on, and then I may be more picky about preparing a real trophy. Until then I like the price (Free) I pay now. 8)