Resurfacing brings worn and unsightly floors back to their original beauty. Resurfacing is much more extensive than recoating, and the techniques are ideal for hardwood floors that are already dull and scratched. First, machine sanding removes the old finish and exposes new wood. After sanding, the floor can be stained if you desire a specific color. Finally, to protect the floor, either a surface finish or a penetrating seal and wax are applied.