It would be best to ask this question in the 'painting' section----I have a similar question. in that we want to have the ceiling in our bathroom Plastered. I know we will be using Plasterboard which is similar to sheetrock. the rafter spacing is just under 16 inches so I figure 1/2' plasterboard would be ok. We will be using Miller Accro Pure Paint in an Eggshell finish. What would be the best prep for the raw plaster before painting?
one coat of primer---Zinsers 123 would be my choice--then two coats of a good quality paint----Go to a busy paint store ---I like Benjamin Moore and Sherwin Williams---but there are other good ones.