How can the cutting edges of handheld shears (tin snips) be resharpened?

The correct method for resharpening the cutting edges of handheld shears, or tin snips, is through grinding. This process effectively removes dull metal from the edges, restoring their sharpness and allowing for clean cuts. Grinding involves the use of a grinding wheel or another abrasive surface to reshape the blades, preserving their geometry and enhancing their cutting performance.

This method is preferred because it allows for precise control over the sharpening process and can be done quickly. It is also effective in rejuvenating the shears that have been used frequently and may have developed chips or unevenness along the cutting edge.

Although other methods like filing and polishing may be useful in certain contexts, they do not provide the same level of efficiency and effectiveness as grinding when it comes to significantly dull or damaged cutting edges. Soaking in oil serves a different purpose, primarily to lubricate metal components and does not contribute to sharpening.