Originally Posted by JW357
Sorry for the stupid question, but as I understand pitting on the barrel is unsafe. I'm assuming your process makes it safe?
Could you please explain that, or am I completely off base?
I assume you mean pitting on the outside that might make the metal too thin?
Shotgun barrels are thin to begin with (especially at the muzzle end). This is a legitimate concern. In this case the pitting was not very deep.
There is no way to put metal back when it has rusted away (short of welding). So if the metal has been thinned too much by the rusting, it should probably not be fired.