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How to paint a textured ceiling
Cover the entire floor and any furnishings with as many drop-cloths or sheets as needed.
Set up a ladder or scaffolding that is tall enough to allow you to reach the ceiling without straining.
Put on safety glasses to protect your eyes from loose texture and dripping paint.
Vacuum the ceiling using a hand-held vacuum cleaner with a soft-bristled attachment, being careful not to damage the texture. Tape around all the wall edges with painters tape if you are painting the ceiling a color that differs from the walls.