Sharpening a saw can be tedious, however, you don’t need to do it more than once per season, and the time spent will make your cutting chores much easier. You need a round file and a vice – and of course, a dull saw.
Lock the saw blade into the jaws of a bench vice, teeth pointing up.
Use a round file to sharpen each individual tooth. The teeth have a beveled side and a straight side; sharpen the beveled side.
Run the round file between the teeth to sharpen. You should see a new, shiny edge as each tooth becomes sharp.
Continue sharpening the teeth until you have done them all.
Turn the saw over in the vice and sharpen all the teeth on the other side of the blade.
Spray the blade of the saw with a light lubricating oil to preserve the finish and prevent rust.
Coat the wooden handle with a light coat of linseed oil.