I was filling up my storage cabinets with all the spray paint cans I have. I couldn't find any because they were always about 5 deep. I made a shallow shelf system that hold about 135 of them and I can easily see them.
When the garage is the only place in a house that has space for storage - or to use as a workshop - finding enough space to move around and work can be a problem. I found this project on Family Handyman that shows how to make narrow roll-out shelves and while you may not find the exact same mechanism to install there are alternatives. http://www.home-dzine.co.za/diy/diy-garage-sliding.htm