[CAUT] key leads

[johnparham at piano88.com]

Keith,

This topic is dead now, but FYI, polyurethane does not seem compatible
with sulfuric acid.  Remembering back in my Belzona days, I remember
that sulfuric acid at different concentration levels has a dramatic
affect on what it is and is not compatible with.

Hope your holiday was restful.

-John Parham
Hickory, NC

> -------- Original Message --------
> Subject: Re: [CAUT] key leads
> From: Keith Roberts <keithspiano at gmail.com>
> Date: Mon, December 21, 2009 12:47 am
> To: caut at ptg.org
> You can try sealing it from the air but more than likely it's caused by a
> bad mix of recycled lead. Like the expanding action brackets. Maybe lead
> from car batteries got in there. Lead is very non reactive in its pure state
> and a neutral enviroment.
> Will the polyurethane seal off sulfuric acid?
> Keith Roberts
> On Sun, Dec 20, 2009 at 9:06 PM, <johnparham at piano88.com> wrote:
> > I've never tried it, but why not just zapping it with a quick shot of
> > clear polyurethane spray to seal the leads?
> >
> > -John Parham
> > Hickory, NC
> >
> > > -------- Original Message --------
> > > Subject: [CAUT] key leads
> > > From: "David Ilvedson" <ilvey at sbcglobal.net>
> > > Date: Wed, December 16, 2009 11:04 pm
> > > To: pianotech at ptg.org, caut at ptg.org
> > > List,
> > > I have perused the archives about oxidizing key leads.   Seems to have
> > been around 1996 or so...I have an Apollo Grand with the beginnings of
> > oxidizing leads.   Some sticking keys etc.   My first inclination is to just
> > chisel off and seal with lacquer or something like that.   Anyone want to
> > hazzard how long it would take to remove the leads and replace with new?   I
> > probably should give the customer that option...
> > > I'm guessing 1 hour for travel back and forth.   1 hour to disassemble
> > and reassemble action.   1 hour to remove leads and a couple to swedge in
> > new ones...am I dreaming here?   What do you think.
> > > David Ilvedson, RPT
> > > Pacifica, CA 94044
> >
> >