LC, I can tell you one thing for sure: the hardener and uncured epoxy is like poison and a few drops on your skin and you can end up with something between a nasty rash on the low end of the scale or in hospital if you are more sensitive. I am not kidding. Fully cured epoxy is inert but it tkaes many days and in colder temps several weeks before it is fully cured. Good info in Dan's link. Wondering how toxic the fumes during the curing process are; what masks to wear etc. You must be confusing epoxy with something else LC, it does NOT clean up with water - acetone workes fine when still wet however if you get acetone with epoxy contamination on your skin you might as well peel your skin right off. Vinegar seems to dissolve uncured epoxy and when you rinse the tools after the vinegar soak with hot water it cleans up ok. That's my preferred methd now and a lot safer than with acetone. Somebody a better method?