Comments. WALNUT.
Fillers are a waste of time. With a HEAVY BODIED soft oil varnish or even just reheated acid killed “boiled” linseed oil I can fill most American Walnut in 3 days in summer when I have good sunlight. Then put on a top coat of linseed oil varnish and then either rub it back with rottenstone and varnish or leave it depend on how it looks.
Stains often do more harm that good unless the person INSISTS on a certain color. Then of course there is paint.
Synthetic finishes, varathane, permalyn, etc should be avoided like the plague. They almost always look like plastic.
Friend who used to work for a VERY skilled gunmaker said “they look like the grain was painted on”.
Having stripped a couple of modern rifles with a thick, one REALLY thick, plastic finishes I can assure you that a so-so piece of wood under plastic turns out much more attractive with a natural oil finish. And a don’t use Tung Oil. Some if not most tung oil products you find are largely solvent and linseed oil with a little Tung Oil to make it “legal” to call it tung oil.
Waterproof. A finish that is hard enough to be waterproof will invariably check. I can remember hunters (I guided hunters a few seasons years ago) bringing Remington (Dupont plastic finish) into a cabin and as they warmed you could HEAR the finish checking with little “pings” and such. It was laughable. But they looked nice and shiny, though not very “lively” in the store where they were bought.
A finish on a coffee table is different than on a firearm. Firearms finishes must be ELASTIC. “Flexible” is NOT the same thing. Anything you buy that has a low natural oil content is designed for indoor use on furniture and such.
Linseed oil. The “boiled” stuff you buy at the lumber yard or hardware store is pretty useless as a stock finish. First off its not heated in the vast majority of cases. They just wadd driers and sell it. Raw LS oil never really dries. Anyone who has an unmodified WW-II M1 who puts a piece or diaper flannel in the oiler holes in the stock knows this. And it never really gets shiny, which is good when hunting heavily armed “people” in some jungle.
Store bought “boiled” Linseed Oil is just a BASE for a good stock finish. Oh it will work but it dries VERY slow and will cloud if exposed to much liquid water, rain or snow, where it is gripped by the hand anyway. AND its often not darke enough in color. So don’t use something meant to be painted on a fence or barn as stock finish. It will protect the wood but its a PITA as a stock finish for the most part. I have written of making store bought oil into a stock finish a few times and the last batch I used Eric Kettenburg’s formula with a slight tweek of my own. I really like this. And its traditional. AND its invariably faster than using a “finish” that is 80-90% solvent and thus only a small amount of solids. I have filled American walnut with heavy bodied reheated LS oil with no resins in two days with summer sun. Not going to go into the how. Just seal with a light bodied varnish cut with some aged turpentine the day before. Then heavy coats of the heavy oil, rubbed back with Burlap or 0000 steel wool when it gets gummy. NOT dry. Experiment. I seldom use more than a soak coat and shine coat of the resin bearing oil on Maple.
Wear. Stock finishes wear. The British used to have guns reoiled after every hunting season. Finally Don King, a friend and mentor used (IIRC) Sherwin-Williams “Beauty Lok” or maybe Lock. It has stood up very well on a DK Hawken I have used quite a lot. I suspect that it had a natural oil as the “finish” ingredient. But don’t know and do not know if its still being made. But Don, like myself was not into built up finishes. Which show wear more than “in the wood” finishes do.
This is a better photo of the “English” gun and better shows the colors a little. Would be better in the sun but is in the 20s and cloudy. And what I get on my computer is somewhat subdued once on the website and I am sure this is true of most if not all photos posted here. And IIRC since its European Walnut its only got maybe 3 coats. Its been used and has a dull spot or two.