Dec 6, 2020 · Process. Step 1: Degrease the Corten area by spraying it with the water and dish soap mixture and wipe dry. Step 2: "Pickle" the Corten by spraying the white vinegar on the degreased area. Throughout the process, keep a paper towel handy to wipe away any excess spray that might end up on the stainless legs. Step 3: Mix the hydrogen peroxide