At Sony we used beeswax which is what the GC dressing is. Your wife may
have some in her sewing basket, or you can get it anywhere where they
sell thread.

I read once in an antique radio restoration article in _Hands-On
Electronics_ about using stick paraffin for just such an occurrence. I've
never tried it myself, but it may be easier to get.

Matt J. McCullar, KJ5BA