I suffer from a form of psoriasis that causes calluses to develop on my fingers and the palms of my hands. The calluses are very heavy and often cause breaks in the skin. A real pain when applying aftershave.

Often times it is difficult to hold and control the tang of my straight razor. I've thought about wrapping a single layer of friction tape around the tang but I am concerned about potential damage to the finish. I've also thought about a small section of rubber tubing thinking that a larger surface might be easier to control.

Any advice?