Tru stone is an Acrylic and needs no finish other then a good polish . I have done allot of tru stone pens and have yet to find one that didn't polish up to a good high shine . I do buff all my pens with buffing wheels and at least white diamond . I have buffing wheels dedicated to only tru stone due to the fact that the tru stone will dirty the wheel , the veining is some type of metal , most likely brass , and the darker colors will turn a new buff black in a very short time .