I have a flat brass Islammic charm that contains a magnet. I wonder if it would have anything to do with protection from edged weapons.
I once sent a detailed picture of it to a friend to post here, as I am not competent to do so; everything else in the package arrived, but that picture was lost in the mail. "It may be a charm against being identified or mailed?" I quipped at the time.

I'm going to have to try that demagnetizing method with the AC coil; where does one obtain such a tool? It seems to me magnetism is a drawback in a blade; attracts armour rather than seams, attracts parrying blades rather than the spaces between them

I have an old salawar yatagan type Peabody bayonet, seemingly made of "cast steel", that is very strongly magnetized at the tip, and the feature annoys me.