To ensure evenness of colour, pour all cans of Dulux Concrete Effect into a clean, dry container. Stir thoroughly prior to use. Before you begin, test your chosen application method on a large piece of board. Work in small sections. Use a long nap roller to apply to the wall. Smooth the surface with a steel trowel with broad, sweeping strokes, holding the trowel at a 60-degree to 80-degree angle. Be sure to keep the trowel clean. Repeat this process over the entire wall. Apply three coats using the same process. Applying additional coats will enhance the depth and appearance of the finish. The final coat should dry for at least two hours, but no longer than 24 hours, before polishing. Using 600-grit sandpaper, lightly polish the surface in a circular motion. Use the edge of the trowel to further polish the surface. Apply enough pressure to keep the trowel edge flat against the surface. Be careful not to gouge the surface with the edge of the trowel. For further protection, allow Concrete Effect to dry overnight and seal with one coat of Dulux Design Clear Top Coat.