How to Determine if the Primer is Exposed?

[MacEdward]

To determine if the primer is exposed, follow these steps: Run your finger over the scratch. If you feel noticeable unevenness or roughness, it indicates that the primer has been exposed. Types of primers include: 1. Dip primer; 2. Water-based dip primer; 3. Anodic electrophoretic primer; 4. Cathodic electrophoretic primer. Most passenger cars use cathodic electrophoretic primer, which is typically white or gray in color. Precautions for car paint touch-up include: 1. Avoid using anything other than soft water for cleaning, including hot water, alkaline water, or water with high hardness; 2. Do not use high-pressure water streams to wash the car body; 3. Avoid using random cleaning agents; 4. Do not wash the car under direct sunlight.