Used water and squares of foil! The foil is not as hard as steel, so it turns into a fine abrasion, no scratches! Shined the 1st one in about 5 minutes! Do not use much pressure. I was amazed... Found the instructions here. They were for a bike, but this is amazing. I will never clean chrome any other way ever again. ever. Thats how good it is. Pictures do not do it justice.