Yes, you are using the garage for storage already, but the space is not being used efficiently and you can never find what you want. It seems to have become home for all types of sports equipment, tools, machines, and a collection of family stuff. The garage's original purpose for parking the cars and a small workout area seem to have been lost in the mess of it all.
Plastic - Plastic shelves are best for children's bathrooms or seldom-used utility rooms. They're easy to maintain, but aren't usually very attractive. Because they can stand up to a lot of abuse, they're great for kids who tend to slam cabinets, shove drawers, and cram as much as possible into them.
Empty off all the shelves. Yep. This is going to be a chore, but in order for you to be successful in getting your book shelves to a professional decorated status you need to start with a clean slate. And besides... I bet your shelves need a good dusting anyway.
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