Andy Dingley :
One interesting trick I've used as a temp solution is soaking in linseed oil. If you soak in water it gets loose again one it dries, but the linseed oil will tend to stay or even harden. Still only a temporary fix, not a true solution.
Then there is the Araldite crowd and their solutions to loose axeheads. I won't comment, since sensitive souls (Foreign Legion noncoms, longshoremen, etc) might take objection to my choice of language.
/Par