Mica powder is often used in nail polish to add a shimmering or glittering effect. Here is a step-by-step guide on how to use mica powder in nail polish: Start with clean and dry nails. Make sure that any previous nail polish has been removed and your nails are free from any oils or moisturizers. Prepare your mica powder. If you are using loose mica powder, you will need to mix it with a...