Restoring shine to a Yamaha

[R Barber]

Someone may have used a solvent based cleaner destroying the finish 
coat?  If the lacquer is still good you might try a wax.
I have no experience with Cory products- I use mother's spray detailer 
and an ultra soft microfiber cloth for lacquer and keytops.  Lets see 
what Yamaha has to say...

> Hi all.  I recently removed about a ¼ inch of dust from a church’s Yamaha
> grand.  There were lots of fingerprints on the fallboard so I proceeded to
> put on some Cory polish that specifically states it removes fingerprints.
> (By the way, this is a lacquer finish.) Well, it immediately clouded up, I
> tried buffing it off, it looked terrible, I applied some Cory wood cleaner
> which made the wood look very dull.  I talked to the Cory people who said it
> was probably reacting with a previously applied oil-based polish and I
> should apply a little Windex to remove the oil.  When I applied the Windex
> nothing happened.  The fall board basically looks like someone removed the
> shine.