Recently my new roof leaked in my great room. The water has stained the unfinished cedar ceiling. How do I fix this, without removing the beams and replacing boards? The ceiling is also tongue and grove. It would cost a lot I'm sure besides the mess. I don't want to ruin it buy wetting the rest of the board but it seems where the water was there is a ring. If I wet the rest to the beam it seems it may dry clean. Sara