Pearlescent paint and metallic paint are two different types of automotive finishes, and their differences are mainly reflected in color, glossiness, and composition. Here are their specific differences:

1. Color: Pearlescent paint has a unique luster effect, and its gloss changes with the angle of observation, presenting a colorful array of colors. In contrast, metallic paint is made by adding metallic powder to regular paint, giving the vehicle's surface a metallic sheen. The color of metallic paint is usually more uniform and does not have the rich color variations of pearlescent paint.

2. Glossiness: Pearlescent paint has a higher glossiness, usually above 90, and can even reach 100. Metallic paint, on the other hand, has relatively lower glossiness, typically between 60-80. This is because the mica particles in pearlescent paint create complex refraction and interference phenomena under light, resulting in higher glossiness.

3. Composition: Pearlescent paint is made with mica instead of aluminum particles, and its paint base contains mica pigments coated with titanium dioxide and iron oxide. Metallic paint, however, adds metallic powders such as aluminum powder and copper powder to regular paint. This allows metallic paint to reflect a metallic sheen in sunlight.

In summary, the main differences between pearlescent paint and metallic paint lie in their color, glossiness, and composition. Pearlescent paint has a unique colorful luster, while metallic paint presents a metallic sheen.