I had other "theme" ideas other than the nut look. But overall, turned out pretty nice.
One of the owner's requests was to have no powder coat or paint. That left acid finish only. The steel had to be completely stripped of mill scale, sanded and muriatic acid cleaned. The steel was almost chrome looking before applying the special acid to patina the steel to a reddish brown, black, etc.
The entire finish was done with acid metal finishing. The last clear black lacquer was misted over the acid base patina to darken the table a little.