Okay maybe I'm getting old or maybe I'm just loosing it, but... During my CWP class today they briefly touched on handgun cleaning and maintenance. We were told that under no circumstances should WD-40 be used to clean or lubricate guns. Okie dokie. As a lifelong automotive/aircraft mechanic I'm fully aware that WD-40 is not a good lubricant and assume it probably wouldn't be good for cleaning gun powder residue. I'm still with it. But when the question was asked of the instructors (guess who asked) why not to use WD-40, the answer stunned me. According to them, WD-40 is absorbed by the metal parts of the gun (specifically the chamber/barrel) and will soften said metal causing the gun to KB. WTF? So, my question to the good members of this forum. Is this "information" correct and if you beleive it to be, can you post documentation stating such? Thanks guys!