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October 26, 2011 03:32 pm PDT
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/qBvWoD00h_M/howto-make-a-magnetic-reverse-hammer-to-remove-dents-from-brass-instruments.html
HOWTO make a magnetic "reverse hammer" to remove dents from brass instruments
SuperMagnete documents a clever method for removing dents from brass instruments using powerful magnets. You insert a steel ball (smaller than the dent) in the instrument, and then use a padded magnet on the outside to "rub out" the dents. A more elaborate method uses a "reverse hammer" that works on harder surfaces. To remove [...]Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/qBvWoD00h_M/howto-make-a-magnetic-reverse-hammer-to-remove-dents-from-brass-instruments.html
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