We know that the salts from a hot blue bath will attack rib joints and many of us have seen the results. But, a thought occurred to me ........ is it a given that there will always be hidden damage from an old hot blue? As I understand it there must be a pit, void, or some entryway into the area underneath the rib(s) for the salts to enter and remain after the bluing job. But, are there always pinholes or other places where the solder isn't sound?
I would think that, in the absence of weep holes, which all doubles don't have, a good, sound solder job could keep all the bluing solution outside. Hoping someone who has done a lot of barrel work on old doubles would comment.
Thanks, SRH
