This is what the OP did to most of my walls and ceilings,
then painted over it. They look like xxxx [add derogatory word of choice]
Son used a wallpaper steamer and scraper on the wall over the mantle and took a long time and got most not all off.
But I am not comfortalbe with using a steamer on the ceiling overhead, Do you think that by using a wallpaper scorer and hot water with fabric softener that we can the this crud off?
any other suggestions?
This is Kitchen ceiling but same as rest of house