You can apply knockdown texture to bare drywall and paint over it later. But I prime and paint the ceiling first, then texture it and leave the texture unpainted. ... Depending on the humidity, the ceiling can be ready to texture in as little as three hours after painting.

Are textured ceilings painted?

It is possible to paint a popcorn or textured ceiling. However, you have to approach the process differently than you would a flat one. The steps appear to be identical between the two types, but you have to take certain precautions that you wouldn't have to when painting a flat ceiling.

How do you tell if a stipple ceiling has been painted?

Spray an area of the ceiling until you see the popcorn turn a dull gray color. If the popcorn texture does not change colors, your ceiling has been painted.