I normally do this first when finishing a new stock, but it should work for you - apply some of the oil finish, using fine sand paper (1000 grit or so) and gently wipe off the excess - let stand a couple of days (warm, not hot place) and repeat till happy - the "sanding dust" will fill the pores - slow but actually neat.
Have fun.
have a nice wood stock on my gun it is a oil finish, there is nothing wrong with it perfect condition. But I would like to get the pores filled in so it will look and feel like glass, what is the procedure for this?
Elmer