Modern Plaster Fireplace . With this gorgeous makeover, a live edge wood mantel now graces the top of this fireplace. The finish depth of the mantle is 3 1/2″. How to Create a Concrete Look with Plaster Plank and Pillow from plankandpillow.com “finished today this beautiful fireplace | limeplaster finish: Continue to 5 of 20 below. Years ago, i saw this picture and breathed, “yes!