Its 38 year old oil poly had been sanded off and the red oak had been coated with waterborne urethane finish.
Black dots on hardwood floor.
Soak a clean cloth or tea towel in vinegar and and gently rub the affected area and allow to dry.
Unlike white water stains residing on the very surface of the hardwood floor dark stains require more steps and products in order to restore the beauty of the wood.
Wipe away mold and mildew spots using a solution of one quarter cup of bleach mixed with one cup of water.
As i searched for more information on this problem all i could find were vague references to metal shavings common on hardwood floor projects due to contractors sharpening scrapers over the floor causing black spots with waterborne finish but nothing explained when how or why this occurred.
Scrub the spot remover with a soft bristled scrub brush for several seconds.
Cut a piece of cotton wool or use soft microfiber.
Place the soaked cloth or cotton wool on the white marks and allow it to soak in the wood to completely bleach the.
Wipe the spot remover off the hardwood floors with a damp cloth.
Prepare a 50 50 solution.
Grime and dirt can tarnish your wood finish to something black if you are not cleaning on a regular basis.
Dark spots on hardwood flooring are commonly the result of some type of liquid that has soaked into the polyurethane finish and top layers of wood.
How to remove black spots from hardwood floors.
Soak it in the hydrogen peroxide.
Add two to three drops of a tetrachloride containing dry cleaning spot remover to black spots.
Measure a small amount of hydrogen peroxide and pour it in a plastic basin or plastic container.
The floor i was dealing with was 740 square feet of red oak flooring.