How to Use a File. Files are designed to smooth wood, metal and plastic. You can remove burrs from corners and sharpen metal edges with one as well. A file cuts only on the push stroke and leaves marks on the surfaces that must later be smoothed with sandpaper.
Things You'll Need
Curved Tooth Files
Match the file shape to the workpiece ' is it flat, round or angled?
Make sure the file lies flat on the work surface.
Use the file diagonally. Push with one hand on the handle and use the heel of the other hand to guide the file.
Work from left to right along the work surface. Reverse direction when you reach the end and work your way back to the beginning.
File until you're satisfied with the smoothness of the work.
Clean the teeth often with a file card.
Keep the file flat to avoid rounding the corners of the work. Fit your files with handles for your comfort and protection.