In article ,
David Combs wrote:

Thanks so much for all the help!

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Wife finally tried some other things, eg ammonia, DIF paste, etc --
nothing worked on that final paste -- then she tried rubbing
alcohol -- WHOOPEE!

Straight -- not mixed with water. (doesn't work)

To make clear: only when diluted, with water, did
it NOT work.

It did work, wonderfully (as compared to almost impossible,
that is) "straight".

David