"Mixed metals" means your design can use standard metal finishes on faucet and shower fixtures. Teens do not need $1000 faucets. They need good quality, sturdy, easy clean faucets. Every single drop of hard water will leave a mark on black faucets. They are unlikely to wipe off the faucets after every use.

Try Moen.

Have you looked at california faucets? Im not sure if they are within your budget but they have some ”industrual” looking lines. We are using their ”Descanso“ line in a new bathroom and with the knurled handles has a slight industrual vibe. They also have a “Steampunk” line too. plus everything comes in a wide variety of finishes.

https://www.calfaucets.com

The industrial feel should come from other "sources" Counter top material, .......vanity stain......Lighting......even tile

Use matte black finish Valve trim, faucetss.......Delta, Brizo, Moen......and you'll get your "look"

Concentrate on mirrors, lighting counter top.....the OTHER stuff.

It's for twin grandsons............no need to rob banks to get a look.

Thanks everyone. It's been so much fun creating this theme bathroom. I’ll post pics when everything is finished.