Excellent work, Splint. Lots of interesting details in this lamp, and everything fits like a glove.
I agree with Oldtool on the finish. The article you linked is a good resource. Do you sand to very fine grits as the author suggested?
The way you get the patina on the copper is fascinating. It must take awhile to get comfortable with the idea that you won’t really know how the tubes will look until the fuming is complete. My wife and I started watching The Great Pottery Showdown, and parts of it reminded me of this blog. The potters decorate their pieces with various colorants, and they can sort of predict/hope how they’ll change in the kiln, but they just have to wait and see.