Bare wood is very vulnerable to moisture. I think Stew-Mac sell an oil that can be applied very thinly with a rag, to wood that has had its finish entirely removed. If my memory serves, it does not build a film so as to deaden, but does slightly dye and seal the wood. I am subjectively clear that bridge pins affect the sound, and also the difference between the usual shaped ones and the ones that the ball comes out the back makes a subjective difference to me. Brass bridge pins have a nice bright resonance to my taste, but if your guitar is already bright they could be too much. If you want to take "zizz" off the sound, try ebony bridge pins. If your inner bridge plate is sufffering, there is a guy who sells little brass plates to go inside, to the ball-ends do not rip into the wood inside anymore.
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