first off where are you getting hexane? i wouldnt be happy knowing its only 85%.
swims used some lab grade hexane for re-x with ok results but found heptane to be better and cheaper.
do you have access to xylene? that would pull more than hexane or heptane but needs re-x several times in swims opinion
around here you can get naptha for about 12-14/gallon at hardware stores instead of doing it in ronsonol bottles. have you looked for it in other forms then the good ol lighter fluid?
but back to hexane. i wouldnt be comfortable using 85% hexane unless i knew what the 15% was. even then i'd be curious if it is hexane or hexanes?
Who's this SWIM person and when do I get to meet them? They sound friken cool!