Do to my stupidity and late night working on this I have a hammer from a 1892 Lebel Pistol that in the process of removing some rust I bead blasted the straw yellow color right out of it.
(should have used steel wool, I know) I'm sure the yellow color was part of the tempering process after they hardened the steel. Anyway I would like to bring that straw yellow color back. Do I need to harden the metal again, quench in oil, cool then temper to a yellow color or can I re-temper the yellow color back to it w/o re hardening. Straw yellow is at about 440-450 degrees so I could temper it in a oven or just use a torch like with everything else.