[quote=limapapa]Guy on the Parker site, I forget who, had what I thought was the best approach to pitting. He said, "You never make a barrel stronger by removing material."

I have read this many times, and it has been repeated to the point that it seems to be gospel. Unfortunately its just not correct. Pitting (corrosion) in many industries is regularly removed and treated.
This is done not only to stop the corrosion but to reduce the stress that can lead to cracking and failures.
As long as a reasonable wall thickness is maintained. Removing the corrosion may not make it stronger than new, but will definitely make it stronger than a corroded barrel and less likely to fail due to stress related corrosion cracking.
Correctly done by experienced gunsmiths “ With proper equipment” The barrel can safely have the corrosion removed if not too deep.
The key is having this work done by reputable barrel smiths.
I have only used Dean Harris who owns Skeets, but I am confident if Dean tells you he can remove the corrosion once he has inspected the barrel, you can be damn sure it will be done right.