Anchorseal is a water-based wax emulsion that sticks to anything. Melted wax is the foolproof standard, but if the wood is at all cool and wet, you have to warm the surface to make it soak in and stick. I have pear flute blanks that I tried this with. Relatively small, I'd just hold an end in...
Had a similar sized burl from a willow oak years ago. A woodturner, I thought I'd hit the mother lode. A hint that I hadn't was in cutting the thing off the tree (regular tree-removal). Stihl 084. Cut a couple feet, then sharpen. Loaded with silica. Finally got it free and it was a massive...