Originally Posted by davidpm
Considering the labor involve in taking the chain plates out then polishing them and reinstalling them you may want to think about replacement.
I remember one story where a guy took out his chain plates they looked perfect but were original so he decided to replace them. He gave the old chain plates to a friend at a machine shop to reuse the steel.
His friend called him a few months later and told him that when he put an old chain plate in a shear to cut it, it shattered. It looked perfect too.
So not only is corrosion a problem but work hardening too.
How lucky do you figure you are?
The boat is a 90's vintage boat, that seems to have not been heavily used. Removing the chainplates is probably an hour. Between my wife and I, we got everything clean in a few hours.
How lucky do I think I am? Of all the potential mishaps in my future, this one is fairly low on the list. For example, my forestay looks good, so I am not replacing it. This, despite that it is the only non-redundant bit holding the mast up.