Gonna be starting out (soon), I was wondering how cold can your work area be when pouring plastics? Only place I could do it is in our garage, it isn't heated (other than a small 220V heater), and it is poorly insulated. So during the winter (Canadian Prairies), it can get REAL cold. So I would open the big door about quarter of the way, and have the heater going. But how cold of a work area be before your plastics won't want to cooperate anymore? How cold is too cold?