I have a old pedestal sink with the over flow at the back and toward the top of the sink. There is a rust stain coming from this over flow, I can clean it with some chemical I found at our local store, and the stain comes back within days. There seems to be moisture coming from this overflow hole, the sink has never been full enough to get water to this hole. Please help!
Re: Sink Stains
Just washing your hands or running the faucet splashes water. Unless you can paint the inside of the overflow to seal the cast iron the problem will persist.