the stains will come straight through emul, u need to seal the stains with a good stainblock which is expensive so mix enough undercoat with a drop of gloss together and roll the entire ceiling with it. once dry apply a nice coat of emulsion. tried and tested........
u need an extractor fan that stays on for a few minutes after u come out the shower and a fixed air brick in the outside wall. after washing walls down with fungicidle wash apply kitchen & bathroom paint 3 coats. water it down a little coz its like gloss.
whislt using emulsions such as silk,sheen and kitchen & bathroom paint, no matter what i spot the filler with it always grins through. i have tried sealers,undercoat,clear varnish even stabiliser but to no avail, any ideas?