Refinishing

gutlo gutlo@bestweb.net
Fri, 19 Apr 2002 08:21:58 -0400


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Hazen,

If the piano is originally black, it likely has a tight grain veneer =
that doesn't need pore filler.  A high solids black primer undercoat =
should do the trick.

Converting mahogany to black is a little trickier.  Filling twice is =
necessary.   In the PianoLac system, we fill once, sand, spray =
Primer/Undercoat, sand lightly, fill again, then spray again.  This is a =
lot easier than it sounds, because the filler applies with a spatula in =
minutes, dries in 30 minutes, and sands like wood.

Be careful if you're shooting lacquer.  Too much undercoat or sealer can =
cause the topcoat to crack.  These coatings have no plasticizer and will =
draw the plasticizer out of the topcoat if too much is applied.

Avoid using auto body type spray on fillers like Feather Fill.   They =
build quick, but can ruin a spray gun if not cleaned immediately, and =
can crack in a freeze thaw cycle (winter move).  They're also incredibly =
toxic and flammable.

There is no way PianoLac filler and undercoat can crack or delaminate =
because it isn't plasticizer dependent.

Arthur Grudko
PianoLac 845 855 0996
  ----- Original Message -----=20
  From: HazenBannister@cs.com=20
  To: pianotech@ptg.org=20
  Sent: Thursday, April 18, 2002 7:02 PM
  Subject: Refinishing


  Hi list,=20
   I am spraying a small grand black,is there any kind of spray primer I =
can use,   instead of having to rub in a grain filler?=20
  Thanks,=20
  Hazen Bannister=20

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