In this video (you don't need to understand Italian ;) this lady lets a focaccia leaven in its own baking tin on a layer of olive oil and then, before topping, turns it upside down. The tins were covered only with a towel, so the dough did form a bit of crust.
I can imagine that the point of turning can be in order to have the wetter side on top and the drier on the bottom, but what's the advantage in comparison to brushing the dough with olive oil before the rising? I think the point of rising in the dish is lost if you manipulate the dough again, no?