Multiple layers with Allumilite deep pour resin

I am needing advice on when to add a swcon layer of Allumilite Deep Pour resin. I had a homemade mold fail so quite a bit of my resin leaked out and I need to add a second layer. A lot of what I've read says it's ok to pour a second layer if the resin isn't hard yet, which is what I have right now. I just want to hear personal experiences with this situation.