one thing you could try is a feather and ink technique i have seen this done to enhance the grain on some expensive shotgun stocks and it can look amazing but as always practice first... to get a good smooth finish on your stock once you think you have finished sanding and you are ready to stain soak the stock with water and dry quickly with a hair dryer this will make the stock rough again then use wire wool to remove the roughness repeat this process a few times to get a mirror finish prior to staining good luck