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Chicken wire. Currently, I am in love with the stuff. I just bought two UGLY plain bookcases from Target and will replace the cheap flimsy cardboard type backs with chicken wire and distress the shelves. Instant character. Will post soon! :0)
Chicken wire + clothes pins = pinboard. Or...use the same idea to hang oddly-shaped pieces of art that you can't find a frame for. Maybe a huge piece for a hall or something and use it like gallery wall. Hmm...