Fill in a Scratch With a Walnut
Scratches on hardwood are unfortunate but inevitable. So, what do you do? Replace the board? Paint over it? Use wood filler? All three—and many more—options are reasonable, but if you’re ever in a pinch and need to cover up a scratch quickly, use a walnut.
Rub a shelled walnut across the length of the scratch. Do this repeatedly, making sure you’ve covered every inch.
Wait 10 minutes. During this time, the natural oils from the walnut will seep into the scratch, solidifying and drying so the scratch becomes the same color as the wood. This process works best on dark-colored wood.
Varnish using any of the methods detailed in this article. The scratch should no longer be visible.