3M sandpaper

[bases-loaded@juno.com]

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
> 
> 
>