Fill it with crayon wax
If the scratch is deeper, raid your children’s wax crayon set. Grate part of a crayon into a small bowl; rest the bowl in a pan of boiling water to melt the wax, then drip the wax into the gouge, smoothing it with a flat knife. You can mix a color to match your wood by adding shavings from crayons of several colors.
Add a bit of petroleum jelly
Smear petroleum jelly over a scratch and leave it overnight. It might help the surrounding wood to plump up and fill in the scratch. Wipe away in the morning and polish the surface.
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