Today whilst we were fitting a large stone hearth in a friends house we managed to drop a couple of small blobs of mortar on his new oak floor. Despite cleaning it up almost immediately it has stained the floor. The floor was laid 4 weeks ago and has had 1 coat of hard waxoil and is awaiting another coat when we have finished his fireplace. Anyone out there know how to remove these stains before the floor is given its final coat?