I have never layered over my shatters but decided sparkles would be perfect. I started with two coats of OPI Glitzerland. I applied a coat of China Glaze Golden Enchantment. I then used my OPI Black Shatter. I finished the look off with another coat of Golden Enchantment. I always use two top coats with my shatters to give them a more smooth look.
What colors are you trying with your shatter!