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Ensure that the sander is unplugged, then use the bolt key supplied with the edging sander to undo the retaining bolt, and remove the old disc of sandpaper (image 1). The key is often stored on a retaining clip on the underside of the sander. Position a new disc of sandpaper and retighten the retaining bolt to hold the disc securely in position (image 2). Ensure the retaining bolt head is well below the sandpaper surface level. Take a firm hold on the sander before starting it, and work around the edges of the room (image 3).
To change the sandpaper on a corner sander, simply take hold of the old paper and tear it off. Align a new sheet of paper with the pad’s face and press it into position (image 1). Use the corner sander to deal with the room's corners, and to sand any awkward, otherwise inaccessible areas such as beneath a radiator (image 2).
Sweep and then vacuum the floor to remove any debris not held by the sanders' dust bags, and wipe with a damp sponge (image 1). If you find any rough areas, sand them by hand. Apply your chosen finish (image 2). Two coats of water-based varnish can be applied in a day (it dries quickly), but some light hand-sanding is needed between coats.
Excerpted from Do It Yourself Home Improvement
© Dorling Kindersley Limited 2009