Thanks guys for the comments, Dave, David, Ed, Mike......your input is greatly appreciated.
Elkhorne, TG, and BP were purchased from Allen Martin, sandcast, and required MUCH filing.
Metal finish per Allen also.
Brown in a sweat box without carding till way past where you'd normally stop, reapplying reagent as necessary.
Then the hard part..... sand it all off. All the way to bare metal, leaving the pitting.
Blue it with your favorite cold blue. Oxpho makes a little darker finish.
Cut it back with skotchbrite pad and CLP to your desired look.