Seems I used the wrong term; apparently I was thinking of "glazing solution". I have an ancient bottle of the Ilford stuff that I scored with a larger auction lot.
Originally Posted by HTF III
Contrary to my above advice about no hardener in paper fix, there's an instruction manual I ran across while looking for "ferrotyping fluid" that recommends hardener for ferrotyping to aid in the release. However, it still does make it very hard (certainly impossible without hypo-clear) to achieve an archival wash.