Don't use harsh acids to remove stubborn rust stains, T-Rust is much safer.  It requires no neutralizing and you can rinse it with clear water. Simply apply it directly to the rust and in a few seconds you'll see it start to disappear.

• Non-Polluting
• Non-Corrosive

Dilution Ratios: RTU     RTU pH: 4.5     Contains: 1 pint