Paint Problem Panic

[Spinny]

Thanks @Nickfromwales

Not sure what to expect never having had it done. I have put some marks around the room using my water level. Is there a standard approach - will they put level markers or sticks taped to the wall to show top ? I assume the whole point of levelling compound is that it will be fluid enough to find its own horizontal.

Any tips or anything to watch for.

[G and J]

Did you solve your paint panic @Spinnywe're having issues with F&B dead flat, 56m2........latest attempt with floetrol added.

 

Really reluctant to try another paint on ceiling as going for "drench" and  walls already painted