[header] How to touch up scratches on furniture [title] Break open a walnut or pecan. [step] Very small scratches that need to be touched up quickly can actually be repaired using only a walnut or pecan. Begin by breaking the meat of the nut open so that the nut's oils are exposed. 
[title] Rub the broken nut across the scratch. [step] Gently rub the nut back and forth along the scratch in the wood surface.