Use a die grinder with the mounted point and simply run the point over the edge of the sheet metal.
How to file sheet metal edge.
As the groove in the point wears just move down the point to create a new groove and so on.
Run the mounted point over the other sides to break those sharp edges.
Angle the file diagonally to the work and press down firmly so that the file digs in and cuts the metal.
Make long slow strokes away from your body.
Cross file to remove material.
Step 2 use your die grinder with a mounted point we like shape w222 and simply run the point over the edge of the sheet metal.
For heavy cross filing grab the handle of the file with the dominant hand and place the palm of the other hand on the end of the file.
Hold the metal in a ring clamp.
Step 1 secure the sheet metal to prevent slipping.
Watch this video and more in the solid edge sheet metal tutorials playlist.
Secure the sheet metal to prevent slipping.
Step 3 push the wedge tightly into the other side of the clamp.
Place the side you wish to file close to the edge of the clamp flat side for flat edges round side for round edges.
Run the point over the other sides to break those sharp edges.
Step 2 use the metal file or the half round file to remove the largest burrs or rough edges.
Step 3 repeat.