Verdigris and Goose Juice (tm) Testing

[David Love]

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A Comparison of Treatments for Verdigris

Abstract:

A test of Goose Juice (TM) for the treatment of verdigris yields =
positive results, while treatment with Protek (TM) is less effective =
both initially and over time.

Materials:

1925 Steinway A action with severe verdigris in wippen flanges.  Goose =
Juice (TM) provided by Joe Goss of Mother Goose Tools, and Protek (TM) =
for comparison.

Method:

Eight flanges were measured prior to treatment with a Neuses 10g =
resistance gauge.   All flanges exhibited characteristic green color =
around center pins.  Five (1 - 5) were treated with Goose Juice (TM), =
and three (6 - 8) were treated with Protek (TM).  Lubricants were =
applied to inside and outside of each side of the flange and the flanges =
were then rotated back and forth 20 times each .  Flanges were left to =
sit for 30 minutes and measured again.  Flanges were then allowed to sit =
for 24 hours and measured once again.   Flanges were measured again =
after 48 hours.  =20

Results:

Flanges  1-5 (Goose Juice (TM))

#            Before treatment       30 minutes        24 hours        48 =
hours

1                        10+                        6                    =
        4                       4
2                        10+                        8                    =
        6                       5=20
3                        10                           5                  =
          4                       4
4                        9                             4                 =
           3                        3
5                        7                              6                =
            4                       4

Flanges 6-8  (Protek( TM))

6                        10                            6                 =
           7                        9
7                           9                            5               =
             7                        9
8                         10                           7                 =
            7                        8

Note:  Maximum gauge reading was 10g.  Any reading exceeding the maximum =
was registered above as 10+.


Conclusion and comments:

Goose Juice (TM) was effective in reducing the effects of verdigris =
significantly more than Protek (TM) on these samples.  Moreover, Goose =
Juice (TM) demonstrated a more lasting effect.  At this writing, it has =
been about 72 hours since the treatment was initiated.  Flanges 1 - 5 =
are still holding at the 48 hour reading.  Flanges 6 and 7 have remained =
at the 48 hour reading.  Flange # 8 has increased to 9g. =20

Long term results are not conclusive from this experiment.  Readings =
should be taken again after 1 week, 1 month, 3 months and 6 months.  =20

Note on application.  Goose Juice (TM) is a more viscous solution than =
Protek (TM) and thus it is not clear to what extent it penetrates all =
the way through the bushing.  Whereas it is easily observable how Protek =
(TM) is easily absorbed by the bushing and surrounding wood,  Goose =
Juice (TM) appears to sit on the surface for much longer and doesn't =
penetrate quite so readily.  Nevertheless, it does appear effective in =
its treatment and it can be assumed that absorption does take place.  It =
would be interesting to see whether modifying the composition of the =
solution so that it contained either a penetrating carrier, or a higher =
percentage of penetrating carrier, would effect the results. =20

Based on these results, it appears that Goose Juice (TM) is at least an =
effective temporary treatment for verdigris, and possibly an effective =
long term solution.  An attempt to duplicate this data should be made. =20

David Love

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