I smell success!
I have used pine pitch to seat obsidian points, but as a shortcut, have found Elmer's carpenter glue to work as well. It being basically a hide glue, I don't feel too guilty.
I like having a "pad" behind the point, it is less likely to shatter that way.
I pretty much have the mindset that the arrow will only be shot once, and that will be at game. Its first flight must be perfect!
Some folks shoot them at bales, however, with no harm done except perhaps dulling.
I have had moderate success waterproofing the sinew lashings with a mixture of pine pitch and deer fat (which I tried out of the bone marrow in a cast iron skillet. Split the bones or prize it out of the tubes with a stick or wire.). The tricky part is getting the right ratio of fat to pitch, and applying it neatly. Not enough fat and the pitch cracks off the wraps, especially in cold weather. Too much and it rubs off.
Sometimes I think maybe a good shot of polyurethane would be nice! :eek:
Killdeer