My old paper cutter had a wooden body and a heavy cutting blade which
had a large spring attaching the moveable blade to the stationary
blade. I cleaned off the little rust and corrosion with a medium to
fine ( 320 to 400 ) diamond hone. A good small diamond file (1 x 3 ")
of a similar grit would probably work.
Clean off the corrosion, if any, using light oil on the large flat
side of both blades keeping the hone absolutely flat to the surface.
You are just removing the larger amounts of corrosion and making the
original surface clean and shiny DON’T CHANGE ANYTHING.
Then keeping the original angle of the top beveled edge, draw file
the top cutting edge until it is clean and shiny as well. Again, you
are not removing much metal, just refining the existing edge. The
bottom blade will be done the same way.
Look at the blades nearest the handle end to see what the blade
angle is. Keep the hone at that angle as you draw it toward and from
the hinge end which would be the most worn.
You may wish to try cutting both 22 gauge metal and 28 gauge metal
first before you do any sharpening, or cleaning. There is an
adjustment nut on the large spring holding both blades together. You
can tighten this some if necessary.
I cut the metal by pushing the upper blade handle against the lower
blade handle and then, push it down.
Some one at a sewing center who sharpens scissors or some one who
works at a printing shop can show you how to sharpen the blades, or
even sharpen it for you.
But try it first, then you might tighten the spring a little bit at
Be careful, the big ones can cut off finger tips.