Rust Remover Rubber Sabitoru 63mmx38mmx8mm
It is great item to remove rust on the metal surface.
I sprinkle water and kitchen cleanser and scrubbing with the rust remover, when I clean kitchen knives.
It looks it composed of rubber and sanding particles.
It is little rougher grit than kitchen cleanser.
If the rust is deep and the rust remover is not able to remove the rust, I use more aggressive abrasive like sanding paper or steel wool.