Buy scratch cover in a similar shade as the wood finish, and apply it to scratch marks. Scratch cover is available as a marker-type pen or liquid applied with a rag. Apply thin, light coats, building the color to match the existing surface.
Choose a matching shade of wood stain, and paint light layers of stain on the scratch marks with a small, thin paintbrush. Allow each coat of stain to dry thoroughly before applying the next coat.
Choose wax sticks in a color that matches the wood finish. Rub wax sticks across the scratch marks to fill in and cover scratches.
Mix instant coffee with water to make a thick paste, and rub the paste into scratches on dark wood tones.
Sand splintered wood scratches with a fine grade sandpaper to smooth away rough edges.
Brush away wood splinters and sawdust.
Apply wood putty with a flexible putty knife, filling in deep scratches. Apply a second layer of wood putty over the first layer so it sits slightly higher than the surface.
Allow the wood putty to dry fully. Sand the wood putty with a fine grade sandpaper to make it flush with the existing surface.
Wipe away dust. Apply a matching color stain to blend in with the wood finish.