Yes, a clay bar can effectively remove brake dust from your car’s paint. Brake dust consists of fine particles that can adhere to the surface, and a clay bar is designed to lift these contaminants without damaging the paint.

Here’s how it works:

1. Contaminant Removal: The clay bar can remove embedded contaminants, including brake dust, that regular washing may not eliminate.

2. Smooth Surface: After using a clay bar, the paint should feel noticeably smoother, as it removes roughness caused by brake dust and other particles.

3. Pre-application: It’s recommended to wash the car thoroughly before claying to remove loose dirt and debris, reducing the risk of scratching.

Tips for Claying:

• Use Lubrication: Always use a proper lubricant to help the clay glide smoothly over the surface.
• Work in Sections: Focus on one section at a time to ensure thorough decontamination.
• Check the Clay: If the clay bar becomes dirty or hard to knead, fold it to expose a clean side, or discard it if it’s too contaminated.

After claying, it's a good idea to wash the car again and apply a wax or sealant for added protection.