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Expert's Corner — pencil

TIP: How Much To Sand?

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TIP: How Much To Sand?

One of the most difficult aspects of wood preparation is knowing how much to sand to remove all the machine marks and other flaws. Here’s a trick that may make it easier. Draw some pencil marks on the wood. Then sand the wood until you have removed them entirely. Sanding is very personal. We all sand differently. We use different grits, more or less pressure, more or fewer passes and with more or less wear on the sandpaper. So you may determine that, for you, sanding off the pencil marks once is enough. Or you may determine that drawing a...

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TIP: Testing Your Finish for Hardness

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TIP: Testing Your Finish for Hardness

You can use architect’s pencils to test for finish hardness (scratch resistance). The lead in these pencils is rated from about 6 or 7B, the softest, to 6 or 7H, the hardest. HB is in the middle. You don’t need to buy all these pencils, just the middle five or six, because most finishes will test to one of these. To prepare the pencils sharpen them with a pocketknife, not a pencil sharpener. Then ground the tip of the lead perpendicular to the length of the pencil on fine sandpaper, or regular paper if the lead is close to flat....

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