I have to second the motion for "ultra slow hardener" the part I did yesterday took 4 hours to layup. You don't want the part the "pop off" while you are still working on it!
My molding room is 8' X 22' in size, so I just seal it up and turn on a heater and set it for 130 F.
8 hours later turn it off and pop the part 36 hour later.