Many years ago when this nail clipper was new I needed to cut a couple of fine copper wires. I had nothing else at the time and I used my nail clipper. The wires made nicks in the cutting edges of the clipper. Eventually I learned a way to sharpen the clipper's cutting edges evenly and did so. (Ignore the surface rust that has appeared in the years since.)
Step 1: Remove the Actuating Lever
The jaws will need to be held in position for sharpening. You need some precision difficult to obtain by using the actuating lever alone. Remove it by squeezing the jaws together with your thumbs or thumb and first finger, or with a pair of pliers as shown here. The lever falls out of the pin. Remove the pin.
Step 2: Bring the jaws together
Insert a screw into the hole for the pin and put a nut onto the threads. Tighten the screw and nut to pull the cutting edges on the jaws lightly together or nearly so. They could be even closer together than shown here.
Step 3: Sharpen
The nail clipper has a flat face at the cutting edges on the front of the jaws. Grinding this flat surface will sharpen the cutting edges equally.
This clipper has a mildly convex surface, so it is easy to grind on a flat sharpening stone. Some clippers are rather sharply concave on the front of the jaws. Light passes with a very fine grinding stone in a Dremel tool will work nicely. Continue grinding lightly until all nicks in the cutting edges disappear. You may need to tighten the screw and nut a little as you go to keep the cutting edges close to one another while you grind. When you are finished, you will have two factory new cutting surfaces and your clippers will work great once again. When finished grinding remove the screw and nut. Insert the pin. Squeeze the jaws together a bit and attach the actuating lever. Wash the clipper to remove any grit from grinding the cutting edges.