On my not-so-urgent project list was replacing the teak backing for the backstay chainplate. I had a new one fabricated out of 1/4" stainless, slightly larger than the teak one. I bedded it in thickened epoxy and used butyl tape to bed the chainplate and bolts. The old one was in far worse shape than it appeared when it was in place, especially the back side.
The new one is certainly overkill, but hopefully that can be permanently crossed off the project list!