I have added fascia boards and curtains to the layout to try to hide some of the mess I keep underneath the layout. The fascia is 1/8" masonite. Because I have narrow aisles and wish to enable my operators to pass one another, I have recessed all my carcard boxes. The color of the painted fascia is an approximation of Southern Pacific's grey color they used on later diesels and the dark grey of the 2-tone grey scheme used on the Lark and the Cascade. The curtains are made from garden weed cloth. It comes in 3 foot widths and various lengths - up to 100 feet. I attached it to the back of the fascia using velcro strips.