20180813
A ukulele came in for repair as the bridge came off (another case of bridge repair).
The owner has used a shoe glue to glue it back but it was not a suitable glue.
So I had remove the glue remnants.
Upon removing it I noticed the top was scribed with a lot of XXXXX and this is the cause of failure...
Normally top should not be scribed with xxxx.
Glue work best with fitting surfaces and if the top is damaged with xxxx scribes, the surface will not be fitting and the chances of bridge coming off is bigger.
After cleaning the surfaces and sanding both side to have better fit, I applied the glue and glued back the bridge to the top.
Scraping the glue remnants on the bridge
Sanding the bottom of the bridge
Removing the glue remnants on the top.
Sanding the top.
Fitting both surfaces
Closeup of the scribing marks on the top (likely cause of the failure)
Gluing the bridge to the top.
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