Put up the panelsThe instructions suggested using an adhesive. Since our walls are textured, we used both adhesive + brad nailer to secure the panels.
Apply spackle and caulkWe used spackle to create additional texture, making sure that the gaps between two panels were covered.
Paint it whiteI used Simply White by Benjamin Moore to match the rest of the walls, leaving some of the gray grout lines to create additional depth between the bricks. The photo shows what it looked like after the first coat.
The Final Product