This type of texture is what can be called "stomping". It's just a large and flat brush that's dipped in watered down drywall mud and "stomped" against the ceiling. If it's painted, getting it off will be a bit of a pain, but all you need to do is take a scraper and scrape off the mounds before sanding the rest down. It's the same process whether it's painted or not, but painted texture is much harder to sand off as paint is designed to withstand that sort of thing.
butteryt0ast98 t1_j1ze06l wrote
Reply to [Question] will DIY popcorn ceiling removal tactics work as well on daybed in plaster? by kharmatika
This type of texture is what can be called "stomping". It's just a large and flat brush that's dipped in watered down drywall mud and "stomped" against the ceiling. If it's painted, getting it off will be a bit of a pain, but all you need to do is take a scraper and scrape off the mounds before sanding the rest down. It's the same process whether it's painted or not, but painted texture is much harder to sand off as paint is designed to withstand that sort of thing.