I used either a very high grade Lindseed oil, High grade Lindseed oil is further refinded to removed the proteins, which is what causes it to mildew on out door furniture. Or I use Teak oil, Teak oil is Lindseed oil mixed with Polyurethane or other oils. Teak oil offers UV protection where pure Lindseed doesn't, it's also thinner which means it penetrates the wood better. Boyds gunstocks has a cursory video that gives a fair explanation on how to do it. To my way of thinking it's hard to beat the beauty and durability of a good hand rubbed oil finish, and it's easy to touch it up when you have and oopps out in the field. And either has the benefit of making the surface of the wood a good bit harder, as it soak in and then sets up.
