when we got our boat, the head which is teak, (whereas the salon is mahogany) which was water stained and faded..
we tried wiping it with different oils and nothing really worked like i expected it to.
but then I came up with an idea of using lemon pledge, which in the spray can goes on thick... I sprayed it on, let it set over the weekend without wiping it off, and when we returned to the boat, the teak was again a rich brown and with no water stains showing.
so from that day on, lemon pledge in the spray can is the only thing we use...