I must agree wholeheartedly with Jon Page and his excellent description
of gluing keytops with the old tried and true hot glue and whiting
recipe.

I bristled when reading the first post of ivories being glued on with
contact cement.  I have removed and repaired soooo many of those
keytops after 5-20 years.  They invariably have turned dark brown under
the thin ivory.

In fact I can truthfully say I have not yet found a use for contact
cement in player piano, piano, reed organ or pipe organ restoration.
There was some clown who wrote a reed organ restoration book where he
told people to cover the bellows with contact cement.  Once I read that
I understood why I had been required to rebuild several organs that had
been so "restored."

Thank you, Mr. Page, for your insight.

D. L. Bullock   the Piano World   St. Louis