lubricant

[teeray]

Could someone describe to me what verdigris is?
 I use a product called Protek which acts as a center pin cleaner and lubricant.
 It does not seem to have any delayed effect and because of it's gental cleaning 
properties (space age polymers) it seems to, in some cases actually fix the 
problem and not just the symtom.

Howard;
  I said in that post that it was nothing I could pin down but that it was
signified by 'oily' stains around the centers/flanges on pianos which I know
to have been taken care of by techs who used Mineral spirits/Mineral oil in
their practice.  Also that a large proportion of these instruments have slight
to moderate verdigris problems.
  I am of the opinion that just putting a lubricant on an action center is
treating the symptom and not the problem, in essence what a lubricant does is
give you a "slicker tight spot" and does nothing to solve the inherent problem
of the tight spot even though it may allow the key to work.  If I was "forced"
to guess the culprit I would tend to go with Mineral Spirits as the culprit
rather than Mineral Oil.  Since I use neither I just don't worry about it
much.
   Besides all of the techs I am speaking of have passed away and I learned a
little from each one of them, both things to do and things not to do.  In any
event Howard if Mineral Spirits works for you and you are comfortable with it
by all means use it with a clear conscience.  Who knows, 50 years from now
some tech might be communicating via the hologram.net about this shoddy tech
named Bryant who was dumb enough to use CPL on some of his pianos :-)
Jim Bryant (FL)