I do the finishing by hand myself. Every piece that leaves here with an aged brass or bronze look got that way on my bench, one at a time. People ask why I don't send it out or speed it up, and the honest answer is that finishing is the part where judgment matters most, so it's the part I trust least to a shortcut.
The chemistry is easy; the judgment isn't
Here's the thing about aging metal: the chemistry is the easy part. Anybody can make brass go dark. What's hard is making it go dark the right way: deep in the recesses where age would collect, light on the high spots where a hand would keep it bright, even across a whole piece so it looks like one object and not a patchwork. That's not a formula. That's watching it, reading it, and stopping at the right moment. Stop too early and it looks like nothing happened. Go too far and you've got a muddy, dead surface, or a rainbow sheen you now have to fight back off. The window is narrow, and every alloy behaves a little differently.
I'm not going to write out how I do it, and I want to be straight about why. Some of this involves materials that aren't safe to hand a stranger a recipe for, and doing it wrong ranges from ruining a good fixture to hurting yourself. What I'll tell you is what you're getting. When a fixture here has that warm, aged look, it's because I stood over it and brought it there on purpose. It wasn't sprayed on, it wasn't faked, and it wasn't rushed. It's the last thing that touches a piece before it's yours, and I want it to be my hands that do it.