James wrote:
I would prob use the resin... but would certainly get new hardener.
Advice from a man who REALLY KNOWS the chem of epoxies suggests that the
resin is very stable but the hardener can degrade quite drasticly .. This
is apparently applicable to 99% of epoxy products regardless of who/where it
was made.

I've been told exactly the opposite by another epoxy manufacturer. They
claim that the resin has a limited life (as evidenced by
crystallization), but their hardener last indefinitely.