Hello Charles, hello Bill – thank you for your replies and related information! I’ll leave the harp “as is” then, and monitor it. The wax that I had in mind by the way wasn’t paste wax or polish. I was thinking of colored wax sticks, made with inert ingredients like beeswax, and used by museum furniture restorers. Given their use of reversible repair materials like hide glue, I suspect that it too is removable, but no matter; I can live with the small visual imperfection. Happy to have found this blog and to be able to interact with those more knowledgable than myself.