The following remedies are for hardwood floors with soft oiled finishes. If needed, end each treatment by staining the wood, then waxing and buffing the spot to match the rest of the floor. Dark spots and pet stains: Rub the spot with No. 000 steel wool and floor wax. If the area is still dark, apply bleach or vinegar and allow it to soak into the wood for about an hour. Rinse with a damp cloth. Heel marks: Use fine steel wool to rub in floor wax.