I will agree that the cold and fiberglass don't mix well. Unfortunately, our first fiberglass build at the new shop took place that first week of January in a Porsche convertible. It was around 35 degrees in the shop (heat not running yet), and never got over 55. General Manager had to take project box home to let it spend the night in his garage under heat. I will NEVER line up a fiberglass job in the cold again. That one sucked...