Shellac can be had from a variety of woodworking sources. The last I got came from Wood Finishing Enterprises
www.woodfinishingenterprises.com
I like button lac myself. It dissolves very nicely for me. I usually put a bit of mastic in with it, which theoretically makes it more elastic.
I only use the lac for filling the grain, which is pretty easy. Pour a quantity of ground up button lac or shellac flakes into a jar and pour in some denatured alcohol (or PGA). Swirl it around every once in a while and in a few days, it's ready to use. I don't try to filter it out because it isn't really necessary unless you are doing a top coat finish.
Slop the shellac on the stock heavily, trying to keep it wet for a while so it will soak in as deeply as possible (it won't soak in all that deeply no matter what you do). Wipe off the excess from the surface of the stock, using an alcohol-wet rag as necessary. Let it sit and dry for a good while, and repeat. When you think it's nearly filled, put on another coat, but leave it standing on the surface. Don't leave much standing, just a thin coat. Let it get good and dry, and then scrub the shellac off the surface with a rag DAMPENED with alcohol. This takes a lot of elbow grease. You don't want to soak the rag (or the stock) with alcohol, 'cause that would remove more than you want to. You don't want any shellac left on the surface of the wood at all. Zero. You may want to do this again if it looks like the grain is not yet filled.
When satisfied, then the surface is prepared for an oil varnish top coat.
This is vastly quicker than doing an oil finish, building up coat after coat in the grain and putting it out to dry. It seems to have been a VERY common method of finishing gunstocks.
An added bonus is that the shellac won't turn the end grain dark and muddy like oil can, leaving the grain clear and bright and purty like it should be.
For an oil finish, I would NOT recommend ordinary "boiled" linseed oil that you get at the hardware store. Barring boiling your own oil to make THICK "black oil", I would recommend using something like Tried and True varnish oil (available at
www.woodcraft.com ). This is "stand oil" (as I understand it) which has been "prepolymerized" in glass covered copper trays in the sun, then with some rosin added. I think there is not enough rosin in it to really make a good varnish (it's still too soft), but would do well for an oil finish. It does work, it does dry, but it has to be put on THIN, and it takes time, and large amounts of sunlight to really dry, just as with any linseed oil.
You can also try your local Wal Mart and go to the craft section and buy a little glass bottle of Daler-Rowney purified Linseed oil (they carry oil for making paints, but no pigments...go figure). It is almost clear and super nice quality. It dries quite fast, considering that it is not boiled, nor has any drying agents added. I have finished a stock with Tried and True, but not with the Daler-Rowney oil. I have messed around with it quite a bit, though. :wink: