Originally Posted by
wetamup2k3g
Change how much of the hardener you mix in, it'll slow up the drying time. If you think you need more time to mold and move, use less hardener. The more you use, the quicker it hardens. I was told if you have a set amount of putty, mold it into a circle and then apply a thin line of hardener across it, then mix, and that should be enough hardener to have it harden good but still give you enough time to manipulate your mixture. I think other epoxies like the Sems stuff Jared mentioned is a 50/50 mix, but Bondo isn't.