I happen to really like rum... and mead.
Since I am also fascinated by blacksmithing and mead, this of course led me to read lots about Viking era mead making and their blacksmithing methods. Let's skip the smithing, and talk about the mead. Clearly one must drink meadin a traditional manner, which as we all know requires the use of an appropriate horn!
See where we are going?
The traditional interior finish for a drinking horn would be beeswax, and I recall reading that the same is used for rumhorns.
I am thinking that if you are going to coat all of the insides in wax, it won't help to char the oak ends. And anyway we are talking rum here, not scotch!
Now at this point I am kind of working the details out as a I go, so you guys see what you think, and see if it's a good plan or not.
I would turn both ends to a very tight fit, and waist it a bit so that when the horn cools and shrinks it grips into the waist.
Make the insides ends of the horn as smooth as possible.
Boil the horn and change the water a minimum of three times to disinfect it, and remove as much of the burnt hair smell as possible. I would just have two pots going and switch from one to the other, refilling the first one for the third bath.
Use the second pot of water as a waterbath to melt your beeswax. Put the wax in a small can or something easy to work with.
Pop the the ends on, and then pour plenty of wax in. Cork it and while the horn is still hot, swish it around, end to end and all around.
Pull the cork and if no wax comes out, pour some more in, cork it and drop in the hot water for a second or two, and swish it around again.
Pour out the excess and that should be it.
Now as I think more on it, and I am just throwing this out there for all to kick around, maybe you should get an empty tuna can, melt the wax in there initially, and put your end plugs in there to soak up wax. Then plug them into the horn, and then pour wax into the corkhole. That should defiinitly seal the ends, and between the wax, the waist, and tight fit make it leak proof.
I am really looking forward to seeing this project. Maybe, if you have the inclination you might document the process.
Best Regards,
Albert A Rasch
The Rasch Outdoor Chronicles We Build a Pirogue!