Hey Dice,
They are not well dry for the moment, I can't bow them yet... I will tell you.
Jorge,
It's the barrel maker who varnish it on his lathe for me. I havent seen the brand of the varnish. And they stay well in between the legs. For other wood congas I made from A to Z I put P.U. mat varnish. That's the same result.
You know, Ash is pretty yellow naturally... but you could try linseed oil with turpentine (very nice) or bee's wax (very nice too) But with this natural products, you maybe have to refinish them every 2 years. A good P.U. varnish could be a better protection.
As usual, the better is to try on a little piece !!!
You could make a topic with that !
Galou.