If chrome towel rails are not maintained, have leaks, or condensation is allowed to sit for prolonged periods of time, rust can develop. Remove rust from a chrome bathroom radiator towel rail immediately.
White vinegar is an effective solution for removing surface rust as its acidic nature will break down the rust. Another tip is to dip a strip of aluminium foil in a small amount of water and gently rub the rusty area. The chemical reaction will remove the rust.