zing_deleted

well steam from the bath and shower will get into the paint and it will peel in time. You could size the walls first to stop and moisture soaking into the plaster but its not ideal. Normal emulsion has no resistance to moisture or mould or anything but your not gonna be there long you should ok. You other option would be to seal the whole thing once you have finished with some clear acrylic varnish but you said your doing it on the cheap