This is something loads of other DIYers have already done so I make no claims of originality but this idea did come to me after ages of trying to think of a way to pretty up my Expedit bookcase. The bookcase is very practical but a bit blah when in front of a white wall. So after seeing examples of other hacked Expedits, I decided to hack mine by attaching a coloured backing. For a DIY project, this is a good one - not many materials are required, it's cheap and quick. The DIY trifecta!
1. Cut the MDF to size so it covers the back of the bookcase. Sand any rough edges.
2. Paint the MDF boards and let dry. I used flat spray paint so that no shiny bits would show up.
3. Attach the boards to the back of the bookcase - I laid the bookcase on the floor on an old towel to make this easier. Then once all the nails are in, put the bookcase upright again and admire your handiwork.
I've been arranging and rearranging things constantly, moving all the cookbooks and dust collectors off the bookcase and putting all my white serving ware out. I love the way the bookcase turned out, it really makes a difference to the space - simply but effective!