Satin Finish

[Paul McCloud]

David:
	It is sometimes difficult to tell which is used- lacquer or urethane or
polyester.  Sometimes there is lacquer on one side and polyester on the
other side.  Sometimes the finish has deteriorated and can't be buffed
up.  You could try using a bit of lac thinner on a hidden spot, or use
some fine buffing liquid and rub a small area.  If it comes black, it is
lacquer.  Polyester is generally thicker than urethane, but can't easily
be distinguished from the other.  Urethane is tougher than poly and
doesn't scratch as easily.  Neither one will be affected by solvents. 
The urethane topcoat on a satin finish such as Kawai's should not be
rubbed or steelwooled.  The urethane is mixed with flattening agents and
dries to a matte finish.  A Steinway finish is all lacquer, and the
matte effect is achieved by rubbing with pumice and rubbing oil. 
(German Steinways use a sprayed matte finish).  I think that the Korean
brands use the same topcoated polyester satin finish as Kawai.  It gives
the soft "glow" effect that the normal satin lacquer finish has.
	Paul McCloud
	San Diego