"But if the action is case hardened by a gunsmith competent in the use of the bone charcoal method the results will be good".
could be true...problem is, there have been enough incompetents attempting to do this kind of work that it makes the whole trade suspect.
"Quality case coloring should provide cosmetic enhancement without endangering gun integrity or shooter safety....Be careful if you are contemplating sending your prized shotgun's receiver to a high heat bone charcoal mechanic.. He is going heat it up to around 1600 degrees F... Make sure that you get it in writing, that if the receiver warps in the heating and tempering process or that if it cracks after firing, then the mechanic will assume full financial responsibility for the destruction of your gun and/or your personal injury".
