Prints damaged by furnace oil

I am looking at salvaging and restoring three prints and one
watercolour that were caught in a flood where the water was mixed
with furnace oil. All of the items have a heavy odour (of oil) and
are tide-marked through their centers. One of the prints is on
watercolour paper, one is on high quality, cotton pulp, printing
paper, and one print is a cheap poster with a high gloss finish on
wood pulp paper. Has anyone encountered this problem before? How did
you deal with it?

My thinking is directing me towards using Varsol or Tri-sodium
phosphate to remove the oil, followed by thorough airing for Varsol,
followed by washing, and thorough washing to remove the TSP. I can
test this on valueless items first--are there any thoughts on going
this route?

Thank you,
Kyla Ubbink
Owner/Conservator Ubbink Book and Paper Conservation
6544 Bilberry Drive
Ottawa, ON  K1C 4N6
613-830-4968


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                  Conservation DistList Instance 23:30
                Distributed: Tuesday, February 16, 2010
                       Message Id: cdl-23-30-014
                                  ***