An accident with oven cleaner has left a large stain and damage on our engineered wood kitchen floor. The chemical has dissolved the surface coating and soaked into the wood. There's dark staining over some of the damaged area, which is embedded in the grain of the wood.
So far we've sanded the surface, tried household cleaners, Liberon wood bleach and household bleach. It's a bit lighter than it was but still (as per photo) pretty unsightly.
Does anyone have any experience or suggestions about how to deal with this? (other than replacing the floor, which we really don't want to have to do).