Wow, you're going to have a lot of watering to do tonight! As you probably already know, you can't overwater gunnite during the curing process. I was out there every hour on the hour spraying from a garden hose to keep the surface the darker tinge which you see in your picture. If it dries out without uniformity, you get crumbles and crunchy crust on the surface, which is scraped out before the PebbleSheen install. Of course, we were seeing 110+F after gunnite, so you may be in better shape if you have any humidity in your air. Coming along nicely,