My boat has double sinks, kind of like bar sinks. I have the house bank off center on the port side, and as a result have a tiny bit of list. Not enough to be hardly noticable, but water knows. The sinks had become slightly stained where a liittle water stands. No amount of scrubbing would get rid of it, even with a copper scrubber. But I found a solution. 1500 grit wet/dry sand paper, a little elbow grease, and they look like new.
