This afternoon, in a warm garage, I mixed some fiberglass
resin and some hardener together. It seems like I had the right proportions... I did my job, left and came back three hours later to find everything as liquidy as when I left. The resin was purchased a couple years ago. I didn't think it could go bad...can it? The tint was greenish instead of the regular caramel color.
I washed everything and started over with new resin. All seems normal this time.