I am relatively new to the art of color case hardening and work mostly on LC Smith and other double barrels for my personal use. I have colored 2 of these guns with decent success. I am looking for a more accurate coloring with consistent results than just dumping the receiver from a rectangle crucible similar to brownells pipe crucible. Does anyone have any advice in a crucible design, way the receiver needs to hit quench, shielding, etc. I have seen some pretty good results from some on the forum. Thanks in advance