Tips for painting Stripes...Lay out your tape lines, then seal the edges of the tape with your original color using a brush or roller. Let dry, then paint your contrasting stripe color over that, and remove the tape while the paint is still a bit wet. Not only will you get a clean stripe, but the only seepage you’ll get is in the original paint color.
to paint crisp lines with no bleeding you can't just tape. Paint wall white. Tape and then paint over the tape with white paint. Then paint the stripe gray. The white paint will seep under the tape and seal so the gray can't seep. Take tape off when paint is still wet. (great tip) SWEET ROOM