Sharpening straight-edged tools, such as chisels and plane irons, is a necessary and regular part of ownership. A dull tool is a dangerous tool. A sharp tool cuts better and is safer because you have more control, and the results speak for themselves: You get clean, flat surfaces that are free of scratches, crisp lines that hit the mark without chipping or blowing out, and the joy of pushing or pulling a tool without undue force or stress. In short, a sharp tool is a good tool. Anything less, and it’s time to sharpen.
Learn hand tool sharpening (specifically hand plane blades) from a master woodworking instructor, Rob Cosman.