In a weekend, flea-market furnishings can be transformed into eye-catching items using wallpaper and paint. Carol Sheehan, editor-in-chief of Country Home magazine, shares how to use wallpaper, old paper and other ephemera to decoupage and redecorate a bureau, cupboard and side table.Tip: Make color copies of journal pages, stamps, botanicals, etc., in order to preserve the originals.