boisdarc Posted August 10, 2016 Share Posted August 10, 2016 Thanks folks, I appreciate the time you took to answer. I will give the chalking another try. Quote Link to comment Share on other sites More sharing options...
Alan Evans Posted August 10, 2016 Share Posted August 10, 2016 3 hours ago, ThomasPowers said: chalk is less messy than graphite and is mentioned in the old industrial arts manuals I have. And Alan how hard is aluminum oxide? I've seen folks scratch their windshield trying to scrape frost off it with an aluminum can before... Once the aluminium has taken the form of the file teeth any abrasive action the other way around would be maintaining (and sharpening) the file tooth profile. The file card wires are dragging across the tooth edge and likely dulling it rather than acting like a butchers steel. The profiled aluminium is more efficient at removing the pins, only one pass is required, so less contact with the tooth edges than the few hundred wires rubbing across per session. that's my story anyway. Copper, brass, wood or some hard plastics would work also. Aluminium is what I had in a handy section when I needed it, so just used it ever since. Try it once and you will only pick up a file card to chuck it in the bin! Alan Quote Link to comment Share on other sites More sharing options...
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