<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top" style="font: inherit;"><div>You might want to reconsider. The "bare metal" under the paint is rough, porous cast iron that has been coated with stuff called 'way back when "Japanning" : I suspect some sort of coal tar derivative that filled the pores and imperfections in the rough sand-casting. (If you want to see what the plate looked like without it, turn the plate over.) Yes, you could take the plate down to that. But you'd be giving youreslf a big job smoothing it out again.<br />( Probably with toxic auto-body filler. ) So why bother? If you don't like the look of some letters, try improving them ( after the bronze paint has been removed ) with a little JB weld, or (the thicker) PC7 and careful sanding and filing. (Besides, I suspect that you'd find the lettering beneath the paint as bad or worse than with the paint on it.)<br /><br
/>Thumpe</div></td></tr></table> <div id="_origMsg_">
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Encore Pianos <encorepianos@metrocast.net>; <br>
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Re: [pianotech] bead blasting wood...gently <br>
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Fri, May 25, 2012 11:14:20 PM <br>
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<td valign="top" style="font:inherit;">I have been thinking of sandblasting my next piano plate in the areas of the<BR>lettering, doing so carefully so as to take it down to bare metal in that<BR>area, before painting again. I would want to do so in such a way as to<BR>remove all the paint while minimally disturbing the iron. The more coats of<BR>paint you put on a plate around the lettering, the more it loses shape and<BR>definition. The idea is refinish the plate whilst retaining as much<BR>definition as possible. Do you or anyone have suggestions as to the best<BR>material?<BR><BR>Will Truitt<BR><BR>-----Original Message-----<BR>From: <a ymailto="mailto:pianotech-bounces@ptg.org" href="javascript:return">pianotech-bounces@ptg.org</a> [mailto:<a ymailto="mailto:pianotech-bounces@ptg.org" href="javascript:return">pianotech-bounces@ptg.org</a>] On Behalf<BR>Of Douglas Gregg<BR>Sent: Friday,
May 25, 2012 4:58 PM<BR>To: pianotech<BR>Subject: [pianotech] bead blasting wood...gently<BR><BR>I have seen some great u-tube videos on cleaning finish off of ornate carved<BR>mantels, etc. with no damage to the wood. There are at least three grades of<BR>baking soda granules for auto body work for removing paint from fiberglass<BR>bodies and metal too. I have used household baking soda with success in<BR>cleaning old and dirty wood action parts as an experiment. It worked well.<BR>It is not aggressive at all.<BR>Household baking soda will not take off paint or finish very well. You need<BR>bigger granules for that. It will clean dirty parts. I use a simple cheap<BR>canister sand blaster that looks like a spray gun with a pipe nozzle. . It<BR>worked fine for small stuff.<BR><BR>Doug Gregg<BR>Classic Piano Doc<BR><BR><BR>Message: 1<BR>Date: Thu, 24 May 2012 22:32:45 -0400<BR>From: "<a ymailto="mailto:jim@grandpianosolutions.com"
href="javascript:return">jim@grandpianosolutions.com</a>" <<a ymailto="mailto:jim@grandpianosolutions.com" href="javascript:return">jim@grandpianosolutions.com</a>><BR>To: pianotech <<a ymailto="mailto:pianotech@ptg.org" href="javascript:return">pianotech@ptg.org</a>><BR>Subject: [pianotech] bead blasting wood...gently<BR>Message-ID: <<a ymailto="mailto:4FBEEF4D.6010809@grandpianosolutions.com" href="javascript:return">4FBEEF4D.6010809@grandpianosolutions.com</a>><BR>Content-Type: text/plain; charset=ISO-8859-1; format=flowed<BR><BR><I've also heard of blasting with baking soda. Tried it? Any info on it?<BR>Thumpe<BR><BR>I've got baking soda in the shop. I was going to use it, but decided to<BR>take a shot with the fine bead, since I already had that in the sump.<BR><BR>I will say that I had to also be very gentle and careful with the soda on<BR>wood, as it is surprisingly aggressive.<BR><BR><BR>Jim
Ialeggio<BR><BR>--<BR>Jim Ialeggio<BR><a ymailto="mailto:jim@grandpianosolutions.com" href="javascript:return">jim@grandpianosolutions.com</a><BR>(978) 425-9026<BR>Shirley, MA<BR><BR><BR></td>
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