the original brick color was a lighter orange to start with, 1st step apply using a light green color(interior flat) thinned about 50%-60% with water. i then applied using a sea-wool sponge in a drifted pattern softening the edges as i went. next step apply duck-backs brand acrylic concrete stain sandstone color using a pump up garden sprayer to the entire surface. be sure it is uneven. next apply slate color tinted a little darker with a garden sprayer(i used this color sparingly) . at the end i apply modern masters dead flat varnish over the whole wall or you can use whatever sheen you desire. always practice first!