Determine if your floor is scratched or gouged. A gouge goes down into the wood and is deeper than a scratch. It cannot be repaired using this method, although it may be less noticeable. A scratch is very shallow and affects only the surface coating of the wood floor.
Decide if you have a wax finish or a urethane finish on your wood floor. Scratches on urethane finished floors are easier to cover than those on a wax finished floor, as the wax finish is very thin and more likely to result in gouges. Wax finishes are generally found on premanufactured floors, while urethane finishes are applied after the wood flooring is installed.
Roughen the scratched area with fine grit sandpaper by rubbing in a circular motion, ensuring that you work the whole length and both sides of the scratch.
Wipe the area with a cloth dampened with mineral spirits to remove dust and wood particles.
Using a hardwood floor finish that is the same color as your floor, cover the scratch by painting it in with a small, narrow paintbrush. Rub the area with a soft cloth to help the finish blend in with the surrounding floor.
Allow the new coat of finish to dry completely, which should take about 30 minutes. Add more finish if needed.