Good point Frew. If I went through lots of IPA I’d consider a different disposal approach; but in my case I only need to get rid of few milliliters at a time. It makes no sense for me to drive 10 - 20 miles to find somewhere to dispose of it like I would used motor oil. The amount of dilute resin in the IPA is so trivial that dumping it on the ground results in the sunlight turning it into inert material.