I thought about that. But this atrium is in the middle of my house..I'd have to lug all that crap through the house, into the atrium, build a form in there, mix it in there, spread it, etc. I guess I need to figure out how much concrete I'd need to pour to do a topcoat before I say no to this idea.
I hear that. Run a hose over the roof and do it by the bucket in the atrium. That's what a concrete crew would do lol