Bar Keepers Friend, a renowned rust remover, effectively removes rust on various metal surfaces, including stainless steel, cast iron, porcelain, and ceramic. It contains oxalic acid, a powerful rust-dissolving agent. The product is easy to use: simply apply it to the rusted area, allow it to sit for a designated time, and then scrub the rust away. Bar Keepers Friend is safe for use on most surfaces and leaves behind a clean, rust-free finish.