you can try wood bleach, but it isnt guaranteed to work on every stain.

here is some more information:

WOOD BLEACH:

http://flooringworld.org/floorsearch.php?query=wood+bleach

HOW TO BLEACH HARDWOOD FLOORING:

http://flooringworld.org/floorsearch.php?query=BLEACHING+HARDWOOD+FLOORS

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There are two ways to do any job.

The right way and the wrong way.

Do it right everytime.

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http://flooringworld.org/

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