Hi William, There's no "easy" when it comes to poly work, it just flat out sucks no matter what. Yes, I would wet sand the entire lid and then buff it. The Konig pastes you have don't work very well with wheels, in my experience. If you have the equivilant of 600 grit scratches, I would wet sand with 1000 followed by 2000. The 3000 is a major pain to sand with and I don't always use it; depends on the situation. Then buff away. Michael Spreeman http://www.spreemanpianoinnovations.com Date: Tue, 17 Mar 2009 19:13:23 -0500 From: bill at a440piano.net To: pianotech at ptg.org Subject: Re: [pianotech] Polyester Finishing Michael, Good to see you here. So, you wet sand in any situation? What about surface scratches on a lid? I'm talking about cleaning up the case of a used instrument here, rather than a repair type situation. IOW, if the scratches were all over a lid, at about the level of p600 - p800? It would seem in this case that using a wheel would be much faster and much easier on the body. William R. Monroe On Tue, Mar 17, 2009 at 5:54 PM, Michael Spreeman <m_spreeman at hotmail.com> wrote: 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 _________________________________________________________________ Hotmail® is up to 70% faster. Now good news travels really fast. http://windowslive.com/online/hotmail?ocid=TXT_TAGLM_WL_HM_70faster_032009 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090317/d0fe1b5b/attachment.html>
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