Painting stripes on the wall? Conventional wisdom dictates that it's best to use painter’s tape. If you want to avoid bleeding, though, go a step further by using the blue stuff as your foundation, then following along its edge with a thin line of latex caulk. This watertight bond seals off the perimeter better than the tape on its own. Once the caulk is dry, paint just up to the caulk line, then wait a couple of hours before peeling away both tape and caulk. Ta-da! Perfect stripes.