Keytops ?? :-( ...

[David Ilvedson]

Years ago when I refinished pianos, we used rotten stone to break up the old finish before applying stripper...very rough stuff...don't know why the difference between the two...

David Ilvedson, RPT
Pacifica, CA  94044


----- Original message ----------------------------------------
From: "Ric Brekne" <ricbrek at broadpark.no>
To: pianotech at ptg.org
Received: 9/1/2006 1:39:59 AM
Subject: Keytops ?? :-( ...



>Obviously you guys havnt been useing the right pumice then.  French polishers use 
>something often refered to as rotten stone. Its pumice alright, but it roughly 
>equivilates to something in the neighboorhood of 1600 grit paper.  0000 steel wool is 
>very rough in comparison.  In fact, if you use rotten stone with a bit of polisher you 
>can end up with  more shine then you started with.  But if you use it with action cloth 
>to buff off the shine.. you get this really nice satin finish thats flat it can be.

>Cheers
>RicB

>...............
>> I don't know, but it is something to think about.
>> I suppose it would depend on the gauge of the scratches. I think that 
>> 600 grit would be less attractive to dirt, than 0000 steel wool.
>> John M. Ross

>I think that's it exactly. I tried pumice, which proved to be 
>too coarse and picked up dirt. I didn't have 800 grit paper 
>available anywhere locally that I knew of or I would have 
>tried that instead of 600. Probably still will (as apposed to 
>steel wool) when I get some.

>Ron N