The heater mght be a problem, I dunno. It's a moisture cured poly, and I don't claim to understand that, but heat kind of sucks moisture up, might be counterproductve.
After I dip it, I spin it until I think about it again, then set it on a shelf overnight, get it the next day or so after work, so I personally let them sit for 20 hours or so. The stuff continues to cure for the next 30 days, and i've noticed that if I bang stuff off rocks the first time out, only a few days after coating, it's more fragile, but the longer it sits, the better off it is.