Stainless Steel Activator
Use over stainless before nickel plating by plating with stainless or nickel anode. Alternatively, use Flash Copper.
Immerse the part in a solution of 50% muriatic acid and 50% distilled water for 10 seconds at room temperature. Brush plate with Stainless Steel Activator and stainless wand, carefully going over the same area several times.