[pianotech] Brass Inlay Repair on S & S Former Concert Grand

PAULREVENKOJONES at aol.com PAULREVENKOJONES at aol.com
Wed May 20 23:58:19 MDT 2009


I just have to say that this is the epitome of what communication on this  
list is about. My kudos to Bill Monroe for taking the time and effort to 
make a  very clear picture of the process and its pitfalls. 
 
Thanks, Bill.
 
Paul
 
 
In a message dated 5/20/2009 11:01:43 P.M. Central Daylight Time,  
bill at a440piano.net writes:

Hi  Thomas,

I've done just this repair.  As others have suggested,  it's a little 
troubling.  In the end, my experience was,  well......OK.  Two new brass "decals" 
later (yes, then entire onlay must  be purchased each time, logo and 
lettering), the results were fine from the  audience.  There are a number of 
problems with this  mess.

First:  If the brass lifting is very minor, you can try the  tiniest amount 
of thin CA.  Using a jewelers oiler is probably the best  option.  The 
finest supply house hypo really delivers more than you need  and the needle 
forces you to lift the brass more than is desirable.   Sometimes this can work.  
When it fails go to......

Second:   You can try removing the old lyre onlay very carefully (maybe 
heating as Jon  suggested) and then fitting the new only in the old lacquer 
shadow.  I  tried this, gave up.  The details of the brass onlay are so fine it 
is  nearly impossible to get it to just "drop in" to the old lacquer 
shadow.   And, if it doesn't just "drop-in" you'll have to pull it back off to  
reposition - which means you'll bend the brass out in the process.  If by  
some minor miracle this works for you, proceed to "Fourth."  And, for  those of 
us living in reality, when that doesn't work  either........

Third:  What worked for me was removing the entire  piece (use whatever 
indexing method you like for replacing it).  I  wouldn't worry about chipping 
the edges of the lacquer, for your next step  will be to............wet sand 
the lyre area starting at 220 to take down the  buildup of clear that was 
around the original lyre onlay.  I sanded an  extended area, basically from 
the lettering up to the top of the treble side,  staying away from the edges 
which are usually either already burned through  from the factory, or soon to 
be by you.  Basically, you are trying to  make it so the area around the 
new onlay won't "pop" as a repair.  Once  the buildup that was around the 
original onlay was worked down "a bit," I  sanded up to p400.  Then apply the 
new lyre onlay.

Fourth:   Once you have the new onlay installed, give the treble side a 
couple or three  "mist coats" of lacquer (you can get it in a rattle can, 
either from S&S  or from Walter Wurdack company.  Then I did a clear doty type of 
touch up  around the lyre to fill in any major unevenness in the finish.  A 
medium  coat of clear, come back tomorrow and sand level, fill in any 
remaining  holes/divots doty style, another medium coat.  Come back tomorrow, 
heavy  coat, next day, level and heavy coat..............ad infinitum, ad  
nauseum.  You must also take care to feather in the new lacquer with the  old 
finish, I usually aim to taper the spray off at the middle of the outside  
treble case curve, and the entire treble case side ends up getting sprayed  
before it's done.

This is a challenging repair.  Best in the  shop.  It shouldn't be done in 
someones home - too much spraying, too  much wet sanding, too much chance of 
having the finish mucked up with daily  traffic, too many trips to make the 
repair (DAMHIK).  You are spraying  lacquer - the entire piano needs to be 
covered - I taped the cover cloth to  the top of the treble side rim and 
then up and over the piano to prevent any  lacquer from getting into the belly 
area.  

When you are wet  sanding to prep the area for the new onlay, DO NOT use 
any lubricant other  than water.  It can cause you all manner of trouble 
getting the new onlay  to adhere.  Again, DAMHIK.

For the final sand, it's to p400 for  me, with water/wool lube and then to 
0000 wool with water/wool lube, then  polish.

It really is quite a time consuming repair.   

William R. Monroe



On Wed, May 20, 2009 at 3:02 PM, Jon Page <_jonpage at comcast.net_ 
(mailto:jonpage at comcast.net) >  wrote:

The  thin brass is not an inlay, it's an onlay or applique. As Paul  stated,
the finish is built up around it. Even if you can purchase the  solitary "S"
without having to but the whole applique, you will also be  extremely
lucky to remove the old letter without chipping the  margins.

Maybe applying heat with an iron (surface protected with a  cloth)
to the "S" will soften the glue and margins enough to limit  damage.

The whole area will then need to be sanded through the  clear
protective coat to make the color and patina make on the  brass
and a clear coat put over it all.

If they want it all  looking the same, remove all the other letters
and leave the black  silhouette.
-- 

Regards,

Jon  Page






**************Recession-proof vacation ideas.  Find free things to do in 
the U.S. 
(http://travel.aol.com/travel-ideas/domestic/national-tourism-week?ncid=emlcntustrav00000002)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090521/a8e53b4c/attachment.htm>


More information about the pianotech mailing list

This PTG archive page provided courtesy of Moy Piano Service, LLC