Indicative Content 3.5: Smooth of curved object

Application of smoothing

1. Sandpaper

    • Sandpaper is a simple way to keep a point on difficult-to-sharpen drawing pencils, charcoal, pastels, or crayons. 12 sheets of 1x4" fine sandpaper are padded and mounted on wood block.

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2. Hand-Sand the Curves

    • Sand curved surfaces—and other areas an electric sander can't reach—by hand. 
    • Treat all areas equally, using the same progression of sandpaper grits for both hand and power sanding. 
    • Start with 80-grit to sand away blemishes, then use 120-grit and finally 180-grit. 
    • Using these exact grits isn't vital (100-150-180 works too), but it's important to progress in steps, removing deeper scratches and leaving finer scratches each time

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3. Sand without Scratches

    • A random orbital sander leaves practically invisible scratches, so you can sand across joints where the grain changes direction. 
    • But move slowly (about 1 inch per second) and apply light pressure. Otherwise, you'll get swirly scratches.

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4. Sand With the Grain

    • Sand with the grain when hand sanding or using a belt sander. 
    • Scratches are hard to see when they run parallel to the grain. 
    • But even the lightest scratches across the grain are obvious, especially after staining.

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