If the Wallpaper Is Pasteed Not only The Surface of the Walls, But the Ceiling The You Need to Start the Past. AFTER MARKING THE FIRST STRIP of Your Wallpaper, Begin to Glue Them Deep Into the Room. On the working countertop, the canvas that you Preparted Be Covered with An Uniform and Non -thick Layer of Glue, Carefully Observing that Glue Doges Not Hit the Edges of Th E Wallpaper.