Howdy folks: By way of introduction I'm a retired ironworker (bridgeman)/machinist who has had a lifelong interest w/ shaving and sharpening. However, let's be clear - I'm an amature, not a pro. I'm old enough to remember Gillette Blue Blades, and well remember when pa switched to Wilkenson ( I've shaved with Blue Blades and for the life of me can't fathom why men switched from straight razors to those god-awful blades - a dreadful shave to say the least!) Pa sold my grandpa's straight razors, but he retained the hones. The both sides of the Koker hone are flat, I checked it with my machinist square; the other one is dished. Generally I true stones by rubbing them on another courser stone on my surface plate, and was wondering if I could do the same w/ this dished hone. If so, what grade of stone do you suggest? My barber sold me two razors (cheap), and suggested I practice on a ballon, but I'm more inclined to practice holding the razors and the moves by tapeing the blades w/ electrical tape. This is my first time dealing w/ Forums so if I've violated so computer etiquette I ask your indulgence - I'm definitely a 19th century guy, you know - single action revolvers, double guns, fountain pens, carbon blades, guy derricks, et al. Thanks for your indulgence and patience; I look forward to being an active participant on SRP.