burlap ... is a excellent abrasive , jute cord also be careful if your doing this while spinning on a lathe , use small pieces of it and make sure its not wrapped around your fingers , or anything that could pull your fingers into it
another trick is to place a sheet of burlap flat on a table , and rub the piece over the burlap with wide long directional strokes going with the grain , old " London Best " stock makers for shotguns would use burlap all the time , they had special concoctions with the primary component being tung oils , also you could use fine wood dust in the concoction as a builder making the formula into paste - I have a very fine double shotgun in my safe , ill provide a pic of a tung oil finish
not all tung oils are created equal , some are different from others , but they do penetrate deep into the wood and bring out a depth and glow, I repair /maintain oiled stocks on shotguns with tung oil and fine steel wool - let the oil soak in , rub it down , wipe it dry , place it up to dry , repeat the process - I would not put tung oil on a box call side for fear of it altering the sound
