Pianotech

  • 1.  Patina and old piano cases

    Registered Piano Technician
    Posted 03-16-2025 22:11

    Years ago I contacted friend who is a professional antique furniture restorer about a pre-civil war walnut "harvest table" that we still use as our dining room table to this day. I explained that I was planning on sanding it down and coating with urethane, but I wanted to check with him before going ahead with it. His response:

    "Yes I have few suggestions I would be glad to offer. First buy a safe, put all your sandpaper in the safe. Lock the safe. Throw away the key. Bury the safe. Never, never take a piece of sandpaper to a piece of furniture of that vintage. You will ruin its value and appearance wiping out 200 years of patina. If you use sandpaper it could cost our friendship.:-)

    Second, review the first step and commit it to memory."

    I had a good laugh. In the end, I adopted his instructions and used a chemical stripper with 0000 steel wool and a varnish to make the table durable while preserving the patina. 

    When I restored a 1907 mahogany Steinway O with a local rebuilder, we used a chemical stripper and we didn't hesitate to sand (by hand). I then French polished it and the result was beautiful. It had previously been badly refinished, so the patina wasn't really a consideration. But on a historic piano with fine veneer that was not previously sanded and refinished, what are your thoughts on maintaining the patina and keeping sandpaper out of the equation? Is there a standard approach to this? Let's assume the veneer is in good condition.

    Thank you!



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    Tim Foster RPT
    New Oxford PA
    (470) 231-6074
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  • 2.  RE: Patina and old piano cases

    Registered Piano Technician
    Posted 03-16-2025 23:27
    If it's _truly_ a historical artifact, then we'd best neither sand nor use chemicals. I don't know the specifics because I'm not a conservator, but those interested in rare old pianos generally want them as un-messed with as possible. The layers of stuff on surface of an old instrument can contain a historical record of how it was originally finished, as well as how it was used and maintained over the years. Melt that with a solvent and steel wool, and you've largely erased that record.

    Beyond that, I find the fixation with "patina" to be a bit oversold personally... If the historical record isn't important, at some point it's just crud ;). Then it becomes a question of what the customer wants and how much they're willing to spend to get it. Certainly we should sand as lightly as possible on rare old veneer, i.e. it makes sense to use chemical strippers for the majority of the work and only sand as much as necessary to get a good result. But that kinda goes for any refinishing job on veneer anyway.





  • 3.  RE: Patina and old piano cases

    Posted 03-17-2025 08:47

    See the two articles by Watson and Eschete.

    https://ptgfoundation.org/resources/archives/



    ------------------------------
    Ed Sutton
    ed440@me.com
    (980) 254-7413
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  • 4.  RE: Patina and old piano cases

    Posted 03-18-2025 12:07
    Miracles can be done with French Polishing without stripping the old finish, if you know how. There are quite a few Youtube videos showing this. If the piano is quite old it would probably be easy to "melt" the old finish. Anyhow, no one has suggested this, but it looks promising. Piano dealers in the UK often have older instruments "re-polished". They use the French Polishing system. 

    Just thought I'd mention this.


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     Richard Adkins 
     Keyboard Tuning and Maintenance
     Curator of Instruments 
             
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  • 5.  RE: Patina and old piano cases

    Posted 03-17-2025 10:39
    Hi Tim!

    The trouble is that people like their antiques to look brand new. Ugh.

    If an instrument is 100 years old why make it look brand new? That 100 years should be respected and cherished as such. Why be fake and pretend an old instrument is the brand new expensive status symbol straight from the showroom?

    "New lamps for old!" No - don't fall for it!

    It's for this reason that in the course of restringing the Hammerwood 1885 Bechstein I didn't want to take the opportunity of making the frame look brand new but merely gave a coat of shellac to give a noble shine.

    Nobility of something old is valuable and tells us that the object might have a perspective of which we were previously unaware.

    Do soundboards of instruments frequently tuned an played have a quality of sound better than those of untuned or unplayed instruments?

    Best wishes 

    David P

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    David Pinnegar, B.Sc., A.R.C.S.
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    +44 1342 850594