Well I did the ceiling, it was painted, and there was about an 8x4 size of plasterboard I'd had to patch in the middle. The ceiling took about a bag and a half to get on and lay in. I mixed it pretty much as I would do multi, it seemed to take a bit longer to mix up but was nice. Got the ceiling on, it went on ok, laid it in and could feel it starting to go 'tacky' but once it was on it seemed to hang wettish and was Easy to trowel. Once it was on I went over it twice with my MT Gold then it finished off with the Nela s*p*r*lex, had the throw a bit more water on it than I would usually use with the s*p*r*lex on multi or board finish but all in all it troweled up nice and was easy to control. So that was that, left the job tonight and didn't slam the door to hard! No it's just a case of will it still be on in the morning lol