I think I can safely say that CA is the preferred method for loose
pin treatment among piano technicians.  It is instant and long lasting.
It doesn't affect going to a larger pin or plate removal.  It can be
effective when 'Pin-Tite' type solutions have failed.  It has even been
used to swab the tuning pin hole and re-insert the original pin.

For false beat suppression, a widely used application other than tuning
pins, look at the subject in this month's "pianotech" list entitled:
  CA Delivery Apparatus
  http://www.ptg.org/pipermail/pianotech/2006-March/subject.html#start

Selected posts: (If you don't want to plow through the whole thread):
  http://www.ptg.org/pipermail/pianotech/2006-March/187316.html
  http://www.ptg.org/pipermail/pianotech/2006-March/187461.html
  http://www.ptg.org/pipermail/pianotech/2006-March/187607.html

The Pianotech archives is abound with these CA topics.

Regards,
Jon Page