Keith Brandman has been a woodworker for over 40 years and had always sharpened his chisels and plane irons using Japanese water stones. These stones work well but are very slow. After buying an electric sharpener, he decided to try and sharpen one of his razors. The sharpener destroyed it because it was too coarse. Keith kept trying finer grits until he got up to 3600. This sharpened the razor but resulted in a harsh shave. He next tried a leather stropping wheel and it worked great. Now, Keith just had to find something that would have the same resistance as the leather while not being too harsh and sent out for samples of every material he could think of. The rubber that Keith found was very good but he developed a treatment that made it work great. Of course, the treatment is the secret sauce.