24 hrs ago I mixed a batch of System-3 to apply some tape on butt joints and build a skeg box. It's just as runny as the moment I mixed it, even the residue in the cup. I'm not without fault, I may have mixed it wrong and humidity has been near 100% these last few days. If it does not gel and turn hard, what is the best way to clean it up. I read that acetone is not always pure if its been recycled. Some of the epoxy is on bare wood, that's what bothers me. Thanks, in advance. Chris