Any boaters out there? I need a spot of help with my fathers boat. The intergal tank has started to rust and we are unable to remove it from the boat, as the boat was built around the tank. Does any one know of a way to clean, fix or make the tank usable? I've been looking at repair kits for motorbike tanks but this boat is a bit big to slosh the solution around as you are ment to do. any ideas or any thing lads?