I appreciate the ideas. I don't think ignoring it is an option as the corrosion is going to continue so the existing plating has to be stripped. Cerakote is a good option, but either Cerakote or re-plating will require me to completely disassemble the receiver, which I'll have to do to strip the existing plating, anyway. I guess it will depend on what the substrate looks like when we get the plating off. If it is badly pitted, Cerakote might be the way to go. (Maybe bondo the pitts. <G>)
I'd still like to know what caused this and I can't believe this is the first Benelli receiver that has had a corrosion problem. There must have been a problem with the plating.