Anytime you work metal you’re creating friction and friction causes heat. I imagine stretching a thin piece of metal 200 times a second would create plenty of heat at the nano level. So, friction could cause enough heat to re-weld ( “cold weld”) metal if the metal has tiny ‘healable’ cracks perhaps? Just a guess from a lifetime metal worker.
Interesting.
According to the video I posted, the thin layer of oxide is what keeps metals from welding together on their own. In space, without the oxide, the metals will weld together on their own.
I like the suggested solution you pose.
I was going to remark that platinum is kind of a non-ideal material for most use cases.
Now mercury is another metal that behaves oddly (for a metal) and is a bit toxic as well.