Preparation is key to an immaculate finish when painting or wallpapering, and this kit contains the 3 elements that provide the solution. The coarse block is ideal for stripping layers of old paint, removing rough wood and heavy dirt or rust. The medium abrasive sands bare timber, removes ingrained paint and light rust, and levels uneven surfaces. To achieve a smooth finish, use the fine abrasive between paint coats or for a final sand or clean. It will also remedy minor blemishes and trapped dust. Each pack contains 10 sandpaper sheets for use on wood, filler, plaster and paint, plus a cork block.