I had a tub of IPA that was used with Tough Resin. Since I live in a predominantly ethanol-using culture, IPA is a bit scarce and costly, so I try to recycle where I can. Unlike the Clear and Gray resins that I used before, Tough doesn’t seem to come out of solution. I left the IPA out in the sun for four days (during a 42C heatwave, no less) and it remained a cloudy mess that dried very sticky on the fingers. Then the proverbial lightbulb went off. I had all the right equipment just laying around:
A simple distiller - two jugs, a hotplate and some tubing. Just look at the difference between the source and result! It produces about a liter per hour, nothing lost to the air, and the end product dries clean as it does from the store. I’m too chuffed with the process actually working (and the fact that it came out of my brain of all places) to analyze whether the hotplate use cost is more than just buying new IPA or lament that I only thought of this during the year’s worst heat, so make of this what you will!