Follow these steps to evaluate the condition of your hardwood floor and its finish.
Finish Condition: Has the finish been worn off or is it just dirty? See if the finish is dull, chipped, scraped or gouged. To test if the finish has worn off, begin in a high-traffic area and pour one to two tablespoons of water onto the floor. If the water soaks in immediately and leaves a darkened spot, the finish is worn and water can damage the wood. If the water soaks in after a few minutes and darkens the wood only slightly, the finish is partially worn. If the water beads on top, the surface is properly sealed. Repeat this test in low- and medium-traffic areas.
Wood Condition: If the finish is worn, the wood may have been damaged. Are there stains, burns, cuts, gouges, holes, cracks or warped boards? If the wood is damaged, repair or replacement may be required before you deep clean your floor or apply a maintenance coat.