sand down

To rub sandpaper on something to make it smooth.

"You need to sand down the door before you paint it, otherwise the paint won't stick."

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What I learned living alone in the countryside for a year.

Nathaniel Drew · 11:20

down sand down some of the hard edges.

Will Smith Examines Mysteries of Planet Earth | One Strange Rock MEGA Episode | National Geographic

National Geographic · 63:11

But get this: all of that sand down there?

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