Start by painting the entire shelving unit with a couple of coats of white paint and leave to dry. Then, using a variety of printed papers, cut out two pieces of printed paper @ 90mm x 110mm, five pieces of printed paper @ 44mm x 110mm and twelve pieces of paper @ 54mm x 44mm.
Then carefully coat the inside of the back of the shelves with a thin coat of PVA glue. Immediately stick the cut pieces of paper to the PVA glue and smooth down with your fingers or glue spatula to remove any air bubbles and leave to dry. Finish by coating the stuck pieces of paper with a thin coat of PVA glue to give them a protective finish.