Old timers used masonite to make rack panels. If it was cut neatly and holes properly drilled, once it was painted with black wrinkle it was hard to tell from metal.
You could cut out dummy panels from a corrugated cardboard box and paint it to match the equipment. It would acoustically insulate a little, too. Like masonite, it could be carefully cut and trimmed, and after painting wouldn't look too JS.
If the homeless can make a shelter out of it, certainly a ham could use it to make a rack panel. You could even use it to rack mount one of those little catfood-tin QRP rigs that pass for construction articles in QST.
