The set contains 3 reagents and a patina effect powder to create a surface covered with patina. Apply an even, smooth layer of a light colored paste like Primer Paste or the Repositionable Hobby Glue. Then gently press the very fine powder into the surface to adhere the powder properly. Be careful not to use too much powder and so not mix it into the base coat. Then drop the 3 reagents alternately. Use a soft brush to blend where the reagents meet. The reaction will start immediately however the final result will be visible after 24 hours. It is recommended to do trials before applying it on the designated object.