[pianotech] How to remove scratches

[Gregor _]

Doug,
 
when you say that you can polish a piano in 4 hours you are talking about that Special French Polish by König? Sounds great. If I got you right, you do the same motoric movements like with the classical French Polish, but the König stuff dries quicker, needs no extra oil and no special finishing to remove oil. I am just wondering why they don´t sell it in Germany. Perhaps there are some ingredients that are prohibited in the European Union? That topic made me more than curious. Hm, I think I will ask König and post the answer in a few days here.
 
Gregor

------------------------
piano technician - tuner - dealer
Münster, Germany
www.weldert.de

 
> Date: Tue, 29 Jan 2013 10:12:55 -0500
> From: classicpianodoc at gmail.com
> To: pianotech at ptg.org
> Subject: Re: [pianotech] How to remove scratches
> 
> Gregor,
> You were doing traditional French polishing. It is much slower with
> more steps and more drying. I can French polish a piano that is
> scratched up in about 3 or 4 hours start to finish. Less time if it is
> not too scratched.
> 
> I will differ a bit about French Polishing a polyester finish. It can
> be done. I have done it and it looks good. However, if possible, it is
> always better to sand and polish out a polyester finish if it has
> enough thickness because it will be more durable than the shellac. If
> you do French polish polyester, you should do the whole piece as it is
> a slightly different sheen and is a little difficult to blend to the
> polyester. There is no issue with adhesion. Shellac sticks to
> practically any surface.
> 
> Doug Gregg
> Classic Piano Doc
> 
> 
> Message: 5
> Date: Mon, 28 Jan 2013 14:49:28 +0100
> From: Gregor _ <karlkaputt at hotmail.com>
> To: "pianotech at ptg.org" <pianotech at ptg.org>
> Subject: Re: [pianotech] How to remove scratches
> Message-ID: <DUB104-W63D0C0C454F44C09F93D9CD4180 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> 
> Doug, thank you for your detailed answer. I am familiar with French
> Polish. During my apprenticeship I completely polished some pianos,
> but that?s more than 20 years ago ;-)  I was just wondering if that
> K?nig stuff is something special or just shellac. Usually I would
> prepare the surface by sanding and use oil for polishing and some kind
> of pore filler (Bimsmehl is the German word, could not find a
> translation for that) and after polishing I would use some benzoic
> acid to remove the oil. But using a very special stuff in a one step
> polishing procedure sounds quite charming :-)
> 
> Concerning removing scratches on poyester: no, French Polish does not
> work. The best method on polyester is just very fine sanding (if
> needed at all, depends on the depth of the scratches) and polishing
> with a machine.
> 
> Gregor
> 
> ------------------------
> piano technician - tuner - dealer
> M?nster, Germany
> www.weldert.de
 		 	   		  
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