Did a repair on landing ceiling Friday. 1930s house . Ended up striping all the paint off entire lid .came off clean . Easy. Back to original plaster. It’s dusty n dry so I told customer I’ll put watered down pva on it .there painter has told them that’s no good . Needs washing down and sum zinger stuff. And paint . I’m not bothered as they don’t want to pay to skim it . Just wanted your opinions. My solution to every problem is pva and more pva . I’m thinking about putting it in my tea to help my back problems.