CHARCOAL BLUING A GUN BARREL with Tom Snyder. 45 Minute run time. This DVD features gun builder Tom Snyder demonstrating a traditional method to blue gun barrels. This DVD also includes a segment on making charcoal since commercial charcoal is not suitable for this procedure. There is a bonus segment to highlight tools Tom makes for those interested in building 18th century style firearms in a traditional manner. No. 869904