A few years ago,I came across and old Marlin 94, 38-40 made in about 1906. It looked about the same. I used a cold blue on it from Brownell's ( Oxpho Blue)with particular attention to detail as to the process.

Heat the metal and degrease.
Apply solution generously and let set overnight.

Buff with a cotton rag for a more blue color or steel wool for a deeper black.

Repeat process if it is streaked and not deep enough.

It isn't a very robust blueing,but will give the metal some color and you can retouch anytime.

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Last edited by saddlesore; 12/18/16.

If God wanted you to walk and carry things on your back, He would not have invented stirrups and pack saddles