Gradient nail designs with a sandpaper finish refer to a nail art style that involves blending different colors on the nails to create a smooth gradient. The sandpaper finish gives the nails a textured, slightly rough appearance, which can add a unique and modern look to the nails. This style is achieved by applying a base coat, followed by a gradient of colors, and finally, a top coat. The sandpaper effect is created by gently rubbing the nails with a fine-grit sandpaper to create a subtle texture. This trend combines artistic expression with a touch of texture, making it a popular choice for nail enthusiasts.