If nothing else, this is immediately useful to the sport of fencing. If you're not aware, competitive fencers already wear metallic jackets to detect when one

If nothing else, this is immediately useful to the sport of fencing. If you're not aware, competitive fencers already wear metallic jackets to detect when one has been hit by the other's weapon. If this could make them cheaper/lighter/more durable/more accurate or improve them in any way, that would be pretty cool. I'm guessing you could even track the specific place that they hit.