How many folks have messed around with greenstuff before?

I got some green stuff more than a year ago and used it once or twice to add some purity seals to a few models, then I didn't get much hobbying done for months. My greenstuff still works though some little flakes of the yellow putty seem to have permanently hardened into chips/lumps which makes getting smooth material a bit tougher. Still happy with how this guy turned out though!