Quote Originally Posted by uwe1 View Post
Just wondering aloud, is it possible that the copper fouling filling in the rough texture, eventually gets as smooth as the rest of the leade kind of like smoothing over rough areas of drywall with putty? If it does, the rough surface would cease to be as rough. The "roughness" would then only be re-exposed if the leade/bore were to be cleaned with a copper solvent.
That's a hypothesis. Now go find supporting data.