surely the younger will have come across metal in garments before? or maybe only me. think McQ, Dior Homme, Damir Doma, Song for the Mute or CoN. The last two are Aussie but SW&D so probably not known. I've only ever seen it used to provide a sheen (very light chain mail style running through) for skinny jeans and jackets.
Song has dressed Lupe Fiasco and Kanye before.
I remember when metal garments were all the rage. Here's a pic of me from the '90s: