What to do with water stains

[sanuni]

Afer "nearly" finishing some work on my boat several weekends ago, I packed up and left one of the seacocks open. Of course this was the one going to the plumping I had just worked on. Several days later, I received a very unwelcome call from my friendly marina operator, informing me that my boat was sinking and they could not access the interior of the boat. I immediately went and corrected the 3 problems. (water pumped out, stopcocks closed, and now the marina has access to my boat).

Fortunately, the vessel did not get water in the engine, but it did leave a nasty water mark on the interior bulk heads. I have scrubbed off the stain (litterally) and now have a visible reminder of my ignorace. I have never stained the interior of the boat and only used a lemon oil on the teak to keep it looking good.

Does anyone have any ideas on how best to correct this sight?