I saw this post and had to laugh!  About twenty years ago I worked
for the Disneyland custodial department.  We used "A-33" on everything.
It's intended purpose was both cleaning and odor removal.  It worked
quite well but I never thought of using it for pianos.  By the way,
in those days the Fantasyland organ was still playing.  I used to
wander over occasionally to listen to it.

Rob Goodale, RPT
Las Vegas, Nevada