[pianotech] Polyester Finishing

Michael Spreeman m_spreeman at hotmail.com
Tue Mar 17 18:03:36 PDT 2009


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


 



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



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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