I was wearing a Musto sailing coat due to the slightly damp conditions.
..so there was very little chance of any sweat getting through, and certainly no sun-tan
oil.
It is actually the leather at the bottom that has been affected. The leather at the top of the seats is fine. It;s as if the the tanning hasn't fixed in the leather and has been pushed up by the water leaving a tide mark of accummulated "stuff".
