I switch to Sherwin Williams Promar 400 flat, sprayed the ceilings 3 times and when they dried they have spots, didn’t dry to a smooth finish. I didn’t have this problem with PPG Porter flat paints.

I just purchased Behrs paint for the bathroom and it has a primer in it. I was wondering if I could paint the ceiling with the exact paint that I bought or if it would look funny? I have never painted a ceiling before and I have heard that it