Virtually all the glassing I did after 1991 was one step, and that was with standard pe resin. It is even easier with epoxy. At that time we were sealing the blanks beforehand, and the strength to weight was exceptional for hand layups.
There’s a few tricks, but it’s not too difficult. Every glasser should be doing it, saves some time, makes some money.
And the fact that all the laminates are curing tightly together ensures a more accurate board, with no rocker change due to one sided skin shrinkage.