[pianotech] Polyester Finishing

[Dean May]

I polish with different grades of Meguiars and a buffing pad on a 7 inch
grinder. I always have someone on the ready with a squirt bottle full of
water that sprays water almost continually while I buff. It makes a mess,
but produces great results and doesn't require much polish. It keeps the
temperature down and the abrasive in suspension so it can work. 

 

Dean

Dean May             cell 812.239.3359 

PianoRebuilders.com   812.235.5272 

Terre Haute IN  47802

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From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Michael Spreeman
Sent: Tuesday, March 17, 2009 9:04 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Polyester Finishing

 

I've used water, naptha, and/or paint thinner. If you are attempting to
machine buff with these pastes, they will dry out quickly no matter what you
use. Naptha lasts the longest, but wear protective gloves, etc.  
With the time it would take for you to do this yourself with the pastes, you
might want to consider having a poly repair person do it.  The big question
is what type of results are you after? For a near perfect finish, you'll
need the big buffer and compound bar. If you're not after "perfect", you can
make improvements with the tubs, or make a bigger mess of things, depending
on what side of your shop the sun is shining. <G> 



Michael Spreeman 
http://www.spreemanpianoinnovations.com
<http://www.spreemanpianoinnovations.com/> 




  

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Date: Tue, 17 Mar 2009 19:10:20 -0500
From: bill at a440piano.net
To: pianotech at ptg.org
Subject: Re: [pianotech] Polyester Finishing

OK,

Well, thanks for the alternative approaches, I recognize they are there.
I've not used the bar compounds because of the dust - small shop, you know.
So, if I may re-iterate, IF you had paste compounds and IF you decided not
to dump them (and all your used buffing wheels) to move to bar compounds
(and all new buffing wheels) what would you use to moisten them in the tubs?

Anyone?

William R. Monroe


I use the Menzerna 2.5 pound polishing compound bar with four 12" buffing
wheels stacked on a Hitachi 7" polisher. They make a coarse and fine
compound. They say the coarse will take out 600grit scratches. I wet sand
down to 3000grit and only use the fine compound; it's faster and gives a
much better final buff.  Finish with Maquiar's #5 Professional New Car Glaze
to remove any remaining compound scratches (available at automotive paint
stores). 

Michael Spreeman 
http://www.spreemanpianoinnovations.com
<http://www.spreemanpianoinnovations.com/> 





For all the Poly repair folks:

I use Koenig compounds with a large wheel to buff out minor scratches.  I'd
like to ask what any of you use to moisten your compounds if/when they start
drying out?  I'm using the DD3, 2L, 16 compounds in small tubs (500ml).

Thanks folks,
William R. Monroe

 

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