Open windows to vent the air. Paint removers typically produce fumes that can cause dizziness, headaches and fatigue. Put on safety goggles and chemical-resistant gloves.
Apply a few drops of a commercial paint remover to a rag. Blot and gently rub the paint for several seconds until it is no longer present on the ceiling. Continue with the remaining steps if the paint does not come off.
Dip a paintbrush in paint stripper and carefully brush the chemical over the remaining paint until thoroughly covered. Allow the paint stripper to soften the paint for 20 to 30 minutes.
Scrape the paint gently off the ceiling with a clean putty knife. Take care not to damage the surface of the ceiling when scraping. Remove the debris from the paint scraper with paper towels.
Repeat steps 3 and 4 until you have removed the paint off the ceiling. Clean the ceiling with a mixture of 1 tablespoon of trisodium phosphate dissolved in 1 gallon of water.