Grasshopper, think of the panel. Time it begrudges not, and knows not. Neither the resin, nor the catalyst. Is not the hand that makes the lamination indeed the lamination? Therefore be the panel, the resin, the catalyst and the cloth, the hand and the lamination, and the illusion of time will trouble you not.
Either that, or use a slow catalyst in a large batch, put the cloth on dry, pour out the epoxy heavily all down the middle, and spread it quick. Either way works pretty good.