The finish on the inside walls is durable and easy to keep clean but the velcro adhesive does not stick to it well. Can't have it have it both ways? I will. I masked off around the velcro before taping it to one side. Cleaned both surfaces with solvent and sprayed several coats Scotch 90 on both surfaces. Now I can rip the velcro open as fast as I want without fear of it coming detached from the wall!