I usually sand my stock down completely, often wet sanding to get all the old finish off and imperfections out.
When completely dry put on a heavy coat of tru oil (wear rubber gloves)
Dont worry about sags and runs, let dry compltely, apply a second heavy coat. Let dry two days
Now wet sand it with 400 grit back down to wood.
You will be left with a very smooth finish.
Wear thin latex gloves now and dip one finger in the tru oil and rub lightly all over stock serface. Add more oil as needed to make a light covering, no runs or sags this time, you just wat a wet look, probably with a few streaks. Let gry overnight.
Now you wet sand lightly with 600 grit, let dry and aplly another coat of tru oil. repeat this process applying light fingertip application forabout 8 - 12 times, being careful to gently wet sand with 600 grit between coats.
THe very last time you add the tru oil switch over to using your bare finger tips, keep a little solvent nearby for cleaning afterwards..
Now let it dry overnight. Examine the finish and look for light streaks and minor imperfections, if you find any, wet sand again with 600.
Apply one more light coat of tru oil. When dry you need to get some rottenstone from a hardware store and mix up a mild paste with water.
Using a soft cloth and lots of running water rub the finish down with the rottenstone mixture, this will now remove the slightest of burrs and imperfections and a nice gleaming stock. Finally give it a good coat of paste way and polish it up.
Tip, keep your tru oil container upside downand sealed well. The film will be formed on the top of the oil that is upside down and when you re usethe tru oil there will be no film on top.
I have used this method for many years and never had any unhappy customers. Some people will disagree with the wet sanding on the wood
saying that it will absorb moisture and warp.
I have never experienced this in all my gunsmithing years.
Cheers
PEte