How To Paint Lines On A Wall. Let this paint dry, then put painter's tape along the line or on the ceiling. Painting a straight line on textured walls (a pro painter's secret).
If you need work done quickly and flawlessly, you can always opt to use a professional painter.
Painting a ceiling is not as difficult as it may appear. Textured walls are a pain to paint, but painting stripes *really* isn't that bad. You'll want the paint to be completely dry so that the tape will adhere to it. Obviously, the success of this trick is dependent on a number of factors including the ceiling height, lighting, wall texture and the intensity in the color difference between wall and ceiling.