[pianotech] plate finishing

[Euphonious Thumpe]

Plates were originally finished with shellac as the base ( with bronze powder in it) which takes a long time to become brittle. Hence no chipping.


Euphonious Thumpe
 

________________________________
 From: Ron Nossaman <rnossaman at cox.net>
To: pianotech at ptg.org 
Sent: Tuesday, May 8, 2012 11:49 PM
Subject: Re: [pianotech] plate finishing
  
On 5/8/2012 10:17 PM, Joseph Garrett wrote:

> I've found that using an appropriate counter sink on the
> screw holes, right after the initial finishing process, helps to eliminate
> some chipping, but ya really have to have all your ducks in a row to get
> the plate stuffed into the carcus and get the strings on before the darned
> stuff sets up hard. Any suggestions?

Duck straightener, definitely.

Seriously, cleaning out the countersinks and putting a small thin washer under nose bolt and perimeter lags or nuts helps tremendously. My biggest hassle is what unknown acky pucky the last guy sprayed on as a finish, that I don't know exactly how far down I have to strip it to get to something trustworthy. At the least, it seems to be best to take perimeter and nose bolt nut seat areas down to bare metal before priming. Murphy was an optimist when it comes to finish work, in any case.
Ron N
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