Removing stains in hardwood flooring
1. mineral spirits
The mineral spirits will evaporate from the wood completely without leaving a residue. The bleach will have to be cleaned off with water. Both bleach and water will raise the grain of the wood.
If the discolouration of the wood is blue or black and was caused by watering potted plants that were sitting on the wood, then you're not going to be able to remove that discolouration. It's caused by the reaction of the tannin in the wood with the iron ions in water which cause a compound called "iron tannate" to form, which is also called "iron gall ink". If you suspect this is the cause of that discolouration, maybe phone some hardwood flooring contractors to see if they know any way to remove iron tannate stains from wood.
Last edited by Nestor_Kelebay; 07-02-2008 at 11:20 PM.