[pianotech] Scratched Lid

[pmc033 at earthlink.net]

Rob:
	There is a difference between "coating" something, and polishing it. 
Using polish on polyester doesn't "coat" it.  That's why there's a
polishing compound in it.  It works by wearing away the surface.  Coating,
as you would do with lacquer or paint, doesn't do anything to the surface
itself.  If you go back next year to "coat" it, it isn't going to improve
at all.  You'll have to use more "elbow grease", in fact a LOT more, to
make any improvement.  
	Yamaha pianos have a very hard polyester finish, as compared to other
brands.  It takes a lot more buffing on a Yamaha than on the Chinese or
Korean brands which use a softer formulation.  In some cases, the finish is
actually polyurethane, which is extremely hard and also very thin.  Often
this is used on bench tops because it resists scratches better than
polyester.  It can be buffed also, but it takes longer.  If it gets
scratched, polyurethane can't be sanded and then buffed.  That is, unless
you don't mind seeing the primer showing through.  DAMHIK.  Been there,
sanded that...
	I'm sure it will be just as cloudy next year anyway.  Have fun!
	Paul McCloud
	San Diego
	



> [Original Message]
> From: Rob McCall <rob at mccallpiano.com>
> To: <pianotech at ptg.org>
> Date: 08/23/2009 5:37:00 PM
> Subject: Re: [pianotech] Scratched Lid
>
> Then it's even better than I expected!  :-)
>
> I have a contract to tune this piano 4 times a year just before each  
> of their concerts, so maybe I'll do another coat or two every time I  
> go back.  By the end of the year, it'll look great!
>
> Rob
>
> On Aug 23, 2009, at 16:50 , Scott Jackson wrote:
>
> > cloudiness = fine scratches
> >
> > Scott Jackson
> >
> >
> > ----- Original Message -----
> >> fingerprints.  This was done after the cleaning.  So it did remove   
> >> some of the cloudiness, just none of the scratches.
> >
> >
>