![]() ![]() Sanding belt (ceramic aluminum oxide) for fast removal of stock.Sanding screen (silicon carbide) for clog-free smoothing of joint compound."They think a surface feels okay, but after the finish goes on, every flaw and scratch pops out."įor every sanding chore, there's a paper to suit: (With most sandpapers, the coarser the grit, the smaller the number.) The temptation is to skip a grit in the sequence. To prepare bare wood for paint, for instance, Norm starts with 80-grit paper, followed by 100, 120, 150, and 180, and finishes up with 220. Each successive grit erases the scratches of the coarser one before, until the scratches themselves become undetectable to the eye and the touch. Hence the iron rule of sanding: Start with a grit coarse enough to quickly remove surface imperfections and follow with incrementally finer grits. The bigger the particle, or grit, the bigger the scratches. Sandpaper works by scratching away defects with thousands of tiny abrasive particles. The secret to getting good results with less tedium is to choose the right paper for the job. But without proper sanding, any imperfections will be magnified when the final finish coat is applied. "Pushing sandpaper often seems like an endless job," he says. Even This Old House master carpenter Norm Abram. ![]() It's a task many of us wish we could avoid or cut short. And all are made possible by the patient, methodical application of sandpaper. The flawless gleam of an oak floor, the smoothness of a painted wall or ceiling, the high shine of a varnished tabletop - all are signs of a job done well.
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