Back to School & Stage Gallery Foam Canon That Fires Artillery Made by Scott Todd/Creative Environments creative_environments1@yahoo.com I don't know if I ever sent you this pic or not of the finished cannon. We used HWFF's 48" Compound Saw to cut the cannon barrel. I use the Compound Saw for all of our big projects; it's definitely been a life saver. The only thing that is not used from your company is the Hard Coat (Industrial Polymers) for the cannon barrel. The cannon barrel has an insert inside of it so it can fire artillery out of Here are some pics of the cannon from start to finish. The only thing that is not used from your company is the Hard Coat (Industrial Polymers) for the cannon barrel.