iron frame painting

[Sarah Fox]

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Hi Coello,

I wouldn't think you would want any paint in the holes, especially in =
the treble, as that would diminish the sustain (appreciably, I bet!).  I =
also would bet that paint wicked down the agraffe threading would sieze =
the threads.  My understanding is that you would remove the agraffes and =
plug the holes before painting, but others on the list could answer that =
question better than I.  Similarly, you wouldn't want any paint on the =
capo bar.  I don't know about the hitch pins.

You asked about cleaning agraffes.  There are several chemicals (not =
creams or pastes) that remove corrosion from numerous metals.  Here in =
the US, there's Tarn-X, for instance.  This product works great on brass =
as well and is quite gentle on the metal.  (All it does is dissolve the =
corrosion.)  After cleaning with Tarn-X, the sheen of the brass can be =
restored with very light polishing.

My related question to the list (really the only reason I'm posting a =
response, since others here would know more about painting plates):  =
Brass gets brittle with age, of course.  True, it can be softened a bit =
by heating it.  However, how old is too old?  At what age is it a good =
idea simply to retire the old agraffes and buy new?

Still related:  Is an agraffe an agraffe, or are there important quality =
differences?  If so, what is the best source of agraffe?

Peace,
Sarah

  ----- Original Message -----=20
  From: Coello Servicio T=E9cnico de Pianos=20
  To: pianotech@ptg.org=20
  Sent: Wednesday, March 24, 2004 11:17 AM
  Subject: iron frame painting


  Dear list.
  We have to paint an iron frame.
  This is first time we do it.

  Shall we cover the hitch pins with paper for not cover them?
  How about the agraffe? it can cause damage if painting reach into =
their holes? can it cause bad sound? should I cover the agraffes as =
well?
  If not painting, how agraffes can be cleaned?

  Should I use a lacquer after painting, or just the spray-aerosol is =
enough. ?

  Thank you.=20

  Coello
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