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How to remove permanent marker from furniture
Use a solid white toothpaste.
The brand doesn't matter but avoid gel toothpastes or a combination as these don't tend to work as well.
This same process can work with baking soda in place of toothpaste.
Or better yet, use toothpaste that contains baking soda! Squeeze out a generous dollop. Use enough toothpaste to ensure the stained area will be completely covered when the toothpaste is spread around.