i brush my cupcake soaps with mica and it looks wonderful, and it sticks really well. I have a very detailed flower mold, if i dont want a solid color on the tips of the petals, i pour a color into the mold, let it set for about a minute then pour the excess out let it dry spray with alcohol then fill with my main color. you can even try "painting" with melted soap, melt a small amount color it, then dab it into your mold with a paintbrush, spray it with alcohol then pour your main color another technique is to pour the colored in a thin layer and then "scratch" out with a tooth pick desired lines or "veins" in the petal, spray with alcohol then pour your main color