Yeah!
I wonder what the finish is-- did he coat it with something or is that just tarnished brass?
Patina and tarnish, different words for the same thing.
This from the December 2019 Radavist article; "
As the tedium of framebuilding tires Nao’s cerebrum, he takes to customizing Velo Orange bells. First, he disassembles them, then he strips the hard finishing, exposing the brass. At which point he hand hammers each bell in a 360º manner before wax coating and reassembling."