Hi Mark. My first PSL piano - after a lot of sanding orange peel - has turned out quite nice. One question regarding the final rub-down for a satin finish. I sanded through with 400 grit fre-cut gold, followed by 600, and then 800 grit. Then I rubbed it down with the medium (gray - 400 grit type) 3M Scotch-Bright pad. Most of it looks real good, but some areas (maybe where I rubbed a little harder) have a bit of a milky appearance. It is definately not the clear finish that is milky - it was very clear before sanding - but rather a bit of a milky haze apparently from the final rub-out with the Scotch-Bright pad. Any ideas how to fix? How do you do your final satin rub-outs on the Oxford PSL? ----- Original Message ----- From: <bases-loaded@juno.com> To: <pianotech@ptg.org> Sent: Wednesday, May 16, 2001 8:13 AM Subject: Re: 3M sandpaper Hi Greg - I have used the 216U paper you refer to exclusively for the last 4 pianos I have refinished, and I find it to easily be the best paper I have ever used. I also have used Oxford's Premium Spray Lacquer on many occasions and have not had the trouble that you experienced. I have found that it can be sanded safely, although somewhat gently, after a couple hours with no problem whatsoever. Rubbing out after the final coats, though, is another matter. At least a week is preferred, and two is even better, IMHO. I can only surmise that either: 1. the coat you applied was extremely heavy, in less than ideal conditions, and still had a soft belly after 24 hours; 2. There was a contaminant left on the board that didn't allow the PSL to dry properly; 3. You are pushing down way too hard when sanding. It is a good idea when sanding finishes between coats with dry paper to keep a piece of T-shirt handy to wipe off any accumulation on the paper every so often. It will flake right off and prevent any build-up that will compromise your paper's ability to provide a good, even scratch pattern. For the same reasons, wiping off the surface you are sanding of accumulated sanding dust is also beneficial. Mark Potter bases-loaded@juno.com On Wed, 16 May 2001 00:28:36 -0400 Greg Newell <gnewell@ameritech.net> writes: > Dear Lists, > Not too terribly recently I read of the benefits of 3M's fre-cut > gold sand paper. I recently bought some from Jeff Jewitt who told me > to > use it between coats of Oxford Premium spray lacquer. I found that > it > began to remove some material and that material then balled up and > began > to cut grooves in my new soundboard finish! YIKES! I waited at least > 24 > hrs before sanding between coats. Should i have waited longer? Is > there > a better way to use this highly acclaimed product? Are there > different > uses for this paper rather than between coats? I assume that it is > used > dry as it is a paper backing. Is that right? All was saved with a > scotchbrite pad and some careful rubbing. I applied the decal and am > now > ready at my next opportunity to spray over it. So far it looks > great! > > Greg > -- > Greg Newell > Greg's Piano Forté > 12970 Harlon Ave. > Lakewood, Ohio 44107 > 216-226-3791 > mailto:gnewell@ameritech.net > > >
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