Removing Dark Water Stains From Hardwood Floors
Hardwood floors are a precious commodity in the homes of a great many people, and so when something happens to them, they are understandably concerned. Some problems may be fixed simply enough, perhaps just by a bit of dustless floor sanding, while others could end up requiring extensive renovation.
One problem that can occur is when a plant has been kept inside on a hardwood floor. With the necessary watering that this entails, this can end up resulting in a dark water stain on the wooden floorboards. Very dark or even black stains mean that the water has actually penetrated the wood itself and stains of this ilk can be extremely tough to remove, although bleaching is sometimes successful.
Begin by placing a wide belt of masking tape surrounding the stain in order to protect the rest of the flooring. Then sand the area of the stain with either 200-grit or 150-grit sandpaper, which should remove any varnish that may remain on the wood. Then wipe away the resultant sanding dust, make a sponge moist (but not dripping wet) with nothing less than white vinegar of full strength and wipe, continuing this process for several minutes (and remoistening the sponge if necessary). If the stain begins to fade, continue this process several times, waiting a couple of minutes between each go, until it has gone completely.
If this process fails, either a 50/50 solution of chlorine bleach or a small bag of oxalic acid (often found in paint stores) would be the best remaining option for successful stain removal.