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.
Add two to three drops of a tetrachloride containing dry cleaning spot remover to black spots.
Soak a clean cloth or tea towel in vinegar and and gently rub the affected area and allow to dry.
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.
Place the soaked cloth or cotton wool on the white marks and allow it to soak in the wood to completely bleach the.
Measure a small amount of hydrogen peroxide and pour it in a plastic basin or plastic container.
Soak it in the hydrogen peroxide.
Grime and dirt can tarnish your wood finish to something black if you are not cleaning on a regular basis.
Scrub the spot remover with a soft bristled scrub brush for several seconds.
Wipe the spot remover off the hardwood floors with a damp cloth.
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.
Growth of molds on hardwood floor caused by moisture can also destroy the beauty of your hardwood floor.
Wipe away mold and mildew spots using a solution of one quarter cup of bleach mixed with one cup of water.
Ceiling leakage could also be leading drips of water to your floor and no sooner you realize a black stain is already formed.
The floor i was dealing with was 740 square feet of red oak flooring.
How to remove black spots from hardwood floors.
Prepare a 50 50 solution.