Sinks : Prevent Rust
By Wendy Shepherd
Apr 24, 2005, 20:41   Many older porcelain sinks have overflow outlets which have rusty stains because the porcelain enamel stops at the edge of the hole causing the underlying iron to rust. After cleaning the stains on the porcelain, dry the unenameled iron and apply petroleum jelly generously around the drain hole to repel the water. (NYCPaul)