[fish_e_o]

Originally Posted by chuck

Is this coating impervious to moisture?

Originally Posted by fish_e_o

it's used commonly as a replacement for bluing and used frequently used in the machinery world to case harden and inhibit rust formation by holding oil. the process is a form of oxidation not unlike rust.

on a new barrel where you might lapp the bore after treatment i would consider it. then you have case hardening and potentially a very smooth bore.

not by itself