I have used this process to die leather. Its a century's old method for dying leather and wood. Its called Vinegaroon, Its not a dye, It reacts with the natural Tannins and causes a chemical reaction. Vinegaroon gets better with age, I let it set for about a week or until all the steel wool is dissolved. Your arrows look real nice, never thought about using it on arrows, might even try it on a white wood bow. Thanks for posting this > Dan