That's correct, the walls were plastered 4 weeks ago. The yellow stains appear in patches at random. (I had the same problem upstairs where the walls are about 60 year old but I though I didn't clean them properly and I have scraped the paint off now. Haven't tried to paint them again yet)
Hello!!! I have used white Crown paint on newly plastered walls. (I have cleaned the walls with sugar soap first and left them to dry) A few hours later yellow stains have appeared and they stink.
Any idea? HELP!!!!
Beanz