When smoothing curved profiles, you'll need a fine-cutting file to get into the inside corners that your sanding drum can’t reach. But the thick square edges of the file can get in the way and sometimes even damage the workpiece. So rather than abandon this method, Woodsmith's Ted Raife simply modified the tool to fit the job.
As you can see in the drawings above, he ground a bevel on both edges of the file to get more clearance in tight corners. You can make this modification with just a few minutes work at the bench grinder. But you want to be careful to not let the file get so hot that it loses its temper. Keep a container of water close by to quench it and this won't be a problem.
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