Last Month the Japanese try to retrive this mod a little bit more. They played in the at 2pm CET. At the moment the gametracker,com Server Monitorring is off. Hope soon they turn it on. The ranking seems to work.
rust only occurs from the oxidization of a metal. When a metal is wet, especially steel, it'll cause the oxidization process to be sped up. Since it was completely submerged underwater, it can't rust being that it wasn't exposed to oxygen.