Earlier, Stealth Pilot wrote:

Acid catalysed phenolics (like Selleys
308 in australia ) use formic acid ...
...this acid catalyst has been found
to continue working as an acid after
the cure and has led to wood failures
beside the glue joint. people have
died in structural breakups of
aircraft because of it.

The issue of acid-catalyzed urea-formaldehyde glues in Australia is
explored somewhat in the article I cited earlier in this thread. Not
being a wood enthusiast I don't really care one way or the other, but
I think that folks who do care should know that there is more than a
single side to this particular story.

Bob K.
http://www.hpaircraft.com/hp-24