The product you will need is any that contains oxolic acid. It is mild
and available at pharmacies in powder form. There are many marine
products that contain this. It should take out the stains without
damaging the gelcoat etc.

adectus wrote in message ...
I am considering buying a used boat. The boat is in excellent condition.
The only problem is that the boat was keept in water and there is a
brown water stain at the bottom. Is there a way to get this off.


thanks
mark