Is this Tennessee red cedar or western?
I’m curious about the oil you speak of. Have you tried cleaning this with a solvent such as acetone or lacquer thinner? Then gluing?
My suggestion would be to try that and if it is worth the solvent trick, employ that along with the adhesive of your choice. Mine would be Titebond 2 or 3.
Glue and clamp. Band clamps are best for this.
Then, a day or more later, cut for splines and make them out of like or contrasting wood. They will show either way because of the cut angle of the grain.
You could cut with a biscuit cutter (you’ll want to buy one eventually) or else on the table saw with a sled.
I think your idea of making biscuits should be returned to the kitchen where it should stay : )
Kindly,
Lee
-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"
