You will never find a better finish for actions than Formby’s Satin Tung Oi. Wet a lint free piece of cloth or paper shop towel (I prefer paper). Put on a liberal coating but not so much as to run. It will self smooth and contains so little solids it will not fill engraving. Dries in a couple hours to touch and cures in couple days. Very durable. Easily touched up. And is also great for damascus barrels!

When an old man dies a library burns to the ground. (Old African proverb)