>Some hunting around gave me: They're using SLA (curing layers of resin
>with UV light), BJM/wicking for the steel, and lost wax (they're
>printing in wax! fascinating!) for the bronze stuff.
>I'm suuuper interested in their shop set up now.

I've already seen videos of someone else doing lost wax casting by using wax filament in a 3D printer. It was really just a matter of time, since it's just a matter of figuring out a good wax formula and nozzle temperature. It neatly solves the problem of doing what amounts to one-offs that is (normally) part and parcel of lost wax castings.