Yes! To experiment you should use small amounts of the powders – teaspoons, tablespoons, even fractions of teaspoons. Mix the powders together in a small cup, add a little water and stir well. Paint a sample on a piece of scrapwood or cardboard. Keep in mind the color will look lighter when dry. Write down the ratio of your mixture, this way you will be able to easily duplicate a color combination you like in a larger batch.
