How to blacken brass? - General Reloading - Brian Enos's Forums Maku mozo!

Hey guys, I bought some once fired brass recently. Found a handful that look darker, like gunmetal. They aren't steel. Some odd head stamp, characters not English. But I have some with same stamp that are plain brass. Anyone know how this was done? Looks great. Don't know how it loads yet Red

DIY: Wet Media Tumbler (Pic Heavy)

DIY: Wet Media Tumbler (Pic Heavy)

Glock 9mm Major Brass Review with Sil. And Hs6 - 9mm/38 Caliber

Is this case head separation? - non-Dillon Reloading Equipment

S1050 troubleshooting - Dillon Precision Reloading Equipment

9mm Major primers falling/burned! - 9mm/38 Caliber - Brian Enos's

spent 9mm casing look burned. - 9mm/38 Caliber - Brian Enos's

Cleaning corn cob media - 44/45 Caliber - Brian Enos's Forums Maku

DIY: Wet Media Tumbler (Pic Heavy)

Prima V, Different batch, different colors? - General Reloading

9mm major - Split Cases - 9mm/38 Caliber - Brian Enos's Forums

Cleaning corn cob media - 44/45 Caliber - Brian Enos's Forums Maku

Disappointed with my first Open gun - Open Pistols - Brian Enos's