[pianotech] Abrasions in polyester finish

[paul bruesch]

Great information Dean. Thank you again!

On Wed, Sep 7, 2011 at 7:19 PM, Dean May <deanmay at pianorebuilders.com>wrote:

> ** ** ** ** **
>
> When the poly finish gets fine scratches, it looks white. Get some good
> quality automotive wet sandpaper- 400, 600, 1000. Start with the 400 and
> sand in one direction only until all the scratches are obliterated by the
> 400 scratches. Keep things wet, a spray bottle with water helps. Then switch
> to 600 and sand at a 90 degree angle to the 400. Again sand until all the
> 400 scratches are obliterated. Then switch to 1000 or 1200. Sand at 90
> degrees to the 600 until all the 600 scratches are obliterated. You can go
> up to 2000 grade sandpaper if you wish, each time you switch grades go at 90
> degrees to previous grade so you can see when you’ve sanded enough. Work
> hard at keeping a uniform pressure on the sandpaper so your fingers don’t
> carve out grooves in the finish. ****
>
> ** **
>
> You might actually want to leave some of the deep scratches if they don’t
> readily sand out. When everything else gets polished they won’t be that
> noticeable on the vertical surface. ****
>
> ** **
>
> If you use fine enough sandpaper, and I think 1200 is fine enough, you can
> finish by hand rubbing. Get the Maguires or the Turtle wax, white fine.
> Maguires has a very fine grade you can use as well for a final rub, but
> probably won’t be necessary for the side of the piano. If you aren’t
> satisfied with the gloss after hand polishing, try a finer grit on your
> final sanding then hand polish again. ****
>
> ** **
>
> Horizontal surfaces like the lid or music desk are much more unforgiving,
> all flaws are very conspicuous. So you are learning on a good surface.****
>
> ** **
>
> Stress to the customer that you promise to make it a lot better but it may
> not be perfect. If they want perfection they can get it, but it will cost a
> lot of money to bring in a poly specialist. ****
>
> ** **
>
> *Dean***
>
> Dean W May                        (812) 235-5272 voice and text****
>
> PianoRebuilders.com           (888) DEAN-MAY         ****
>
> ********Terre Haute**** ****IN**** ****47802           Give us a LIKE on
> Facebook! Go to PianoRebuilders.com********
>   ------------------------------
>
> *From:* pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] *On
> Behalf Of *paul bruesch
> *Sent:* Wednesday, September 07, 2011 7:43 PM
>
> *To:* **pianotech at ptg.org**
> *Subject:* Re: [pianotech] Abrasions in polyester finish
> ****
>
>  ** **
>
> Dean, thank you for that info. So might the light coloring polish back to
> black? I'm certain that the damage is not .100" deep. My intention is just
> to get it back to as black as possible, not smooth and flat.  This is all my
> own initiative. The owner isn't concerned enough about the cosmetics to pay
> for real repairs, which would probably be very steep.
> Also, I'd be doing this by hand, not with a power buffer.
>
> Paul****
>
> On Wed, Sep 7, 2011 at 4:31 PM, Dean May <deanmay at pianorebuilders.com>
> wrote:****
>
> I used to sell YC’s and one of their selling features was a thicker than
> average finish. My experience in repairing YC finish typically found about
> .100” plus thick.****
>
>  ****
>
> *Dean*****
>
> Dean W May                        (812) 235-5272 <%28812%29%20235-5272>voice and text
> ****
>
> PianoRebuilders.com           (888) DEAN-MAY         ****
>
> ****Terre Haute** **IN** **47802****           Give us a LIKE on Facebook!
> Go to PianoRebuilders.com****
>   ------------------------------
>
> *From:* pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] *On
> Behalf Of *Paul T Williams
> *Sent:* Wednesday, September 07, 2011 4:00 PM
> *To:* pianotech at ptg.org
> *Subject:* Re: [pianotech] Abrasions in polyester finish****
>
>  ****
>
> YC probably used very thin finish on it and it's torn through the finish.
>  Epoxy repair kit from pianotek or something similar should work....or a
> Sharpie! lol
>
> Paul
>
> ****
>
> From: ****
>
> paul bruesch <paul at bruesch.net> ****
>
> To: ****
>
> Pianotech List <pianotech at ptg.org>, ptg_pianotechne at egroups.ptg.org ****
>
> Date: ****
>
> 09/07/2011 01:25 PM ****
>
> Subject: ****
>
> [pianotech] Abrasions in polyester finish****
>
>  ****
>  ------------------------------
>
>
>
>
> A new client I tuned for yesterday has a small YC grand. I noticed
> light/white-colored abrasions on the treble side of the black-polish case,
> right on the outside curve.
>
> When I asked her about how they came to be, she told me that they'd had it
> moved many times, so when they wanted it moved one MORE time, they decided
> to do it themselves ("It looks so easy when the pros do it"), and dragged it
> on a "soft carpet, only soft carpet".
>
> She's the first client I've ever known that had her own bottle of Cory High
> Gloss Finish polish (which I always bring, too) though the piano was quite
> dusty and well-smudged. As I cleaned, dusted, vacuumed, and polished with
> the Cory, I noticed that the abrasions seemed to be slightly reduced in
> intensity.
>
> It just occurred to me now that perhaps this could be buffed out? I didn't
> consider that possibility and took no photos while I was there. I just
> called the owner to ask if she could take a photo or two, but she cannot.
>
> Was the apparent reduction in abrasion likely my imagination? Or would it
> be worthwhile to try something with a very mild abrasive? I'm thinking
> something like "3M Imperial Hand Glaze 05990"
>
> And yeah, I know a photo would probably help a lot... sorry!
>
> Paul Bruesch
> ****Stillwater**, **MN**** ****
>
> ** **
>
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