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AC plywood is the top grade of standard pine or fir plywoods. One side has been sanded so that it is
left smooth, and the other remains rough. It is not unusual to find what are called "footballs", or
plugs in the smooth side. These footballs are inserted where knots used to be. AC is sometimes used as the layer directly underneath flooring as well. It is also often used for projects that require a smooth outside, but don't need a finished back, as with desktops or bookcase backs. |
