In a repair situation, when is it necessary to sand and refinish a panel?

In a repair situation, it is essential to sand and refinish a panel if acid spots worsen. Acid spots can develop from various sources, such as spilled battery acid or contaminants that lead to corrosion and damage to the paint and underlying metal. When these spots worsen, they compromise the integrity of the panel, potentially leading to rust or further degradation. Sanding removes the damaged surface layers, allowing for proper repair and adhesion of new coatings. After sanding, refinishing the panel ensures that the surface is properly prepared for paint, restoring the appearance and protection of the panel.

Other conditions, like blushing or detailing, may require attention but do not necessarily mandate sanding and refinishing to the same extent. Structural panel considerations typically relate more to safety and integrity, whereas sanding and repainting are primarily surface-level concerns. Thus, the situation involving worsening acid spots necessitates thorough sanding and refinishing to address the damage effectively.