Has any of you tried using the hardener from the HB Body 775 epoxy with the rustbuster epoxy paint, I have a third of a can of paint left and the price of a tin of hardener with nearly seven pounds postage makes it pointless buying any from them. I have a load of new HB Body 775, yes I can test it myself, but I'm hoping to avoid wasting epoxy if one of you guys already knows.