I have used the Turpentine/Boiled linseed oilicon mixed 50/50 for years and it works great. Give the stock a heavy coat and let it set about 30 minutes. Then wipe it down good with toweling. If the first attempt didn't remove all the crud, do it again. If you have heavy deposits of crud you may have rub these areas lightly with 4/0 steel wool after coating the stock with the 50/50. After the stock is cleaned, the 50/50 makes a good finish when applied in very light coats. Put a dab on an area and smooth it out until it will spread no farther, then move over and apply another dab.