The only other thing in most store bought acetone is water which the acetone pulls from the air. Things like adhesive remover and paint strippers are usually a hodge podge of solvents with acetone being . If the container is labeled acetone, it is probably fine for removing oil from wood. The "good stuff" is typically referred to as reagent grade(99.5% pure) anhydrous acetone. It can be ordered from an online chem supply or if you have a grainger in your area they have it as well. If you are concerned about adulterants in your acetone place a few drops onto a glass surface and allow it to evaporate which should happen rather quickly. If you can see any residue remaining on the glass it is a sign of an adulterant, more than likely a petroleum distillate. If there is no visible residue, your acetone is fairly pure. If you really want to remove the water for some reason, you can add 1/2 cup oven dried Epsom salt. The salt will absorb the little water that the acetone pulls from the air. Pour the acetone through a filter and you'll have cleaned it sufficiently for just about any use other than graduate level chemistry. If your are just using it to remove oil residue, I wouldn't bother with pulling the water out(making it anhydrous).
