Freezing green stuff

I made the joyous mistake of purchasing a new computer game called Subnautica. Set in a science fiction background you take the role of a lone survivor crash landed on an ocean world. It basically combines survival games with a fascinating storyline. All well and good, but it does take a humongous bite out of my painting time. So a bit of a boring update this week as I waste my spare time swimming in a fictitious ocean. Green stuff, also known as Kneadite, we all know it and (some of us) love it. I buy mine in 36 inch rolls through an e-bay trader called Trolltrader. Unfortunately Green Stuff has a shelf life and with my limited sculpting ability it usually starts going a bit tough around the time I'm halfway through a roll. As tough a the forgotten (and right up there with 'sand' overpriced) pack of Green Stuff at your local GW. I usually turn my green stuff into sand bags when it starts to go. With the arrival of a new supply I thought 'time for an experiment'.

I should not have basecoated buildings quite so close to my ruler...