u/Dramatic_Zebra_2

Hello, Ive just had my ceiling plastered and plasterer told me to give it a mist coat of paint before normal emulsion. I'd never heard of this before but obviously I'll do it. Just wondering rather than water down emulsion myself and probably get ratio wrong and ruin it, are the ones you buy already watered down just as good and any recommendations of decent one, or are the buy ones rubbish