Just like scraping off flaking old paint when going to repaint something like a window or fence. Scrape, remove loose pieces, patch, prime and paint. (At least what I would do but if an actual drywall expert weighs in go with their advice.)
I have cracks in my plaster ceiling but they can't be pushed back in like that. It's from foundation settling as the wife over the last 8 years has been doing yardwork changing the water penetration to the ground.
Good luck OP.
Edit: watched that YouTube link below. If that works that might be easier and less mess.
Stunt_the_Runt t1_j6drmli wrote
Reply to comment by BarkBeetleJuice in How to repair small area of cracked plaster on the ceiling by kmochow
Just like scraping off flaking old paint when going to repaint something like a window or fence. Scrape, remove loose pieces, patch, prime and paint. (At least what I would do but if an actual drywall expert weighs in go with their advice.)
I have cracks in my plaster ceiling but they can't be pushed back in like that. It's from foundation settling as the wife over the last 8 years has been doing yardwork changing the water penetration to the ground.
Good luck OP.
Edit: watched that YouTube link below. If that works that might be easier and less mess.