Skeet,
When you start spraying irridescent colors, spray what is left in the gun on a white index card. Then on the next color spray another color over the previous color on the index card. You can come up with some sweet colors that you cant buy. I have one that changes colors in the light moving in different directions, red to a light gold to an orange. Color shifting if you will. Just be sure to write the colors down, or youll never remember what you did.