What should be done if compounding does not remove dullness from a painted surface?

When compounding does not effectively remove dullness from a painted surface, the best course of action is to clean, sand, and repaint the area. This method addresses the underlying issues that compounding alone cannot resolve.

Compounding is designed primarily to remove imperfections such as minor scratches or oxidation on the surface of the paint. If these methods do not achieve the desired glossiness, it may indicate that the dullness is due to deeper issues like improper application, underlying paint problems, or contamination that compounding can't fix.

By cleaning the area thoroughly, any contaminants that could prevent the paint from adhering properly are removed. Sanding the surface smooths out any uneven areas and prepares it for the new paint application, ensuring good adhesion and a uniform finish. Finally, repainting allows for a fresh layer of color that can restore the shine and aesthetics of the surface.

While the other options might initially seem effective—such as polishing with a different compound or merely applying a new layer of clear coat—these methods may not address the root cause of the dullness and could ultimately lead to similar issues if the surface is not appropriately prepared first. Therefore, taking the more comprehensive approach of cleaning, sanding, and repainting ensures a long-lasting and visually appealing finish.