Work in a stainless steel basin, conected to pole negative of your rectifier (this will make of anode). Another cable connected to positive pole, with a small hook of copper, where you will hang the piece to treating. It is necessary too a rectifier 50A minimum.
Dissolve first white salts in destilled water, inside the basin. Then, add black salts.
Softly, move the piece while electro-polish it.
Work temperature: 60ºC.
Voltage: between 10 to 15V.
Time: between 4 to 6 seconds.
Attention: This product contains potassium cyanide. Do not use it without consulting safety etiquette. Consult too with your prevention labour risk service, to verify the possibility of using it, according to the conditions of your facilities.