The vertical hull was definitely stained by this oil. See the phots of Cal right after the ship had been raised.
As for the "light-colored" planking in the deck phots---exactly, this is not definitive, the decks could be reflecting light.
I am very curious to see a phot which might indicate Tennessee's weather deck was painted. Of the tree "suspects," she was the only one which did not get her weather deck soaked in heavy oil.