A walnut can hide scratches on wooden furniture by filling them with oil
Rubbing a raw walnut over shallow scratches in wooden furniture releases natural oils that darken the exposed wood and seamlessly blend the blemish with the surrounding finish.
The natural oils found in walnuts act as a remarkably effective DIY repair tool for scuffed wooden surfaces. When you rub a shelled walnut directly over a shallow scratch, the soft nut meat breaks down and releases fatty oils into the groove. These oils saturate the dry, exposed wood fibers, darkening them to match the original stained finish of the furniture.
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