To use Pigment Powder with nail polish, you will need to follow these steps:

1. Begin by preparing your nails for the manicure. File and shape your nails, and apply a base coat of nail polish to protect your nails from staining.

2. Once the base coat is dry, apply a coat of nail polish in the color of your choice. Allow this coat to dry completely.

3. Take a small amount of pigment powder on a flat surface, such as a piece of paper or plastic, and use a small brush to pick up some of the powder.

4. Tap the brush gently on the edge of the surface to remove any excess powder, then gently press the brush onto the nail polish.

5. Continue to apply the powder to the nail until you achieve the desired effect. You can use multiple colors of pigment powder to create a unique look.

6. Once you have applied the pigment powder, use a clean brush or cotton swab to remove any excess powder from the nail.

7. Allow the nail polish to dry completely before applying a topcoat to seal in the pigment powder and add a glossy finish.

Remember to be careful when working with pigment powder, as it can be messy and may stain clothing or surfaces. It's also important to use cosmetic-grade pigment powder that is safe for use on nails.