Add architecture with paint and stencils. For the chair rail, use a level to draw a horizontal line on the wall 30 to 36 inches above the floor. Next, align a stencil with the level line, securing it to the wall with spray adhesive. Use stencil paint, craft paint, or wall paint to apply the design. Stencil a second design on door panels. Can’t find stencils you like? Apply wallpaper borders or cutouts instead.