To Use Ferrotone, Follow These Instructions: 1. Oxide Remoal: Apply Ferrotone Directly To The Surface To Be Treated Using A Sponge Or Cloth. Leae On For 5 Minutes, Then Rinse Thoroughly With Water. This Method Is Particularly Effective For Remoing Oxide From Stainless Steel And Chrome, Or For Remoing Yellowing Or Rust Streaks From Fiberglass And Gelcoat. 2. Teak Whitening: Dilute Ferrotone In Water At A Ratio Of 1:10 And Use A Soft-Bristle Brush To Scrub The Wood Against The Grain. Leae On For A Few Minutes, Then Rinse Thoroughly With Water. 3. Descaling Of Cooling Circuits: Dilute Ferrotone In Water At A Ratio Of 1:5 Or 1:10. Circulate The Solution In The Cooling System Or In The Heat Exchangers Of Marine Engines For 15-30 Minutes, Then Rinse With Clean Water. In Su mmary, Ferrotone Is A Highly Effective Product For Oxide Remoal, Teak Whitening, And Descaling Of Marine Engine Cooling Circuits. To Use It, Simply Apply The Product To The Surface To Be Treated, Leae On For A Few Minutes, And Rinse Thoroughly With Water. Dilute The Product In Water According To The Intended Use.