Quote:
Originally Posted by Radio Wrangler
File from the painted side only, release pressure for the return stroke otherwise it will pull paint flakes off.
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"Release pressure (on the file) for the return stroke". Exactly: most metal cutting flies have teeth that are non-symmetrical - like a saw blade - so the cutting takes place of the forward stroke. If the pressure is maintained on the reverse stroke, no cutting will result and doing that will also blunt the teeth. It seems that that correct use of a file is not often realised.
Al.