Cedar decks possess a natural reddish tint that other kinds of wood decking do not have. They also withstand moisture well even without a sealer and continue for many years. But if the surface of the cedar deck is either fuzzy or splintered because of wear or improper cleaning, then you must sand it to smooth the surface. Sanding alters the appearance of the cedar slightly but restores the terrace surface to an attractive, splinter-free condition.
Wait until the cedar deck is completely dry before trying to sand it. This usually means waiting at least twice to three times following rain or washing it.
Remove all the furniture and other things in the cedar deck and sweep the deck thoroughly using a broom to remove any leaves and other debris.
Attach medium-grit (80- to 120-grit) sandpaper to a floor sander using the manufacturer’s directions. Twist the sander in and put it at one end of the cedar deck. Wear a dust mask and safety glasses prior to starting to sand.
Push the ground sander over the cedar planks in a smooth, steady motion following the direction of the boards. Do not let the sander stand in 1 place for at least one or two seconds. Instead, keep the machine moving at all times. Repeat the process using good (180- to 240-grit) sand paper
Sand the corners, borders and inaccessible areas of the deck using an oscillating instrument, repeating the 2 stages from Measure 4 with 120- and 240-grit sand paper.
Turn off the sander and sweep the deck with the broom to remove the sanding dust.