How to Determine if a Car's Primer is Exposed?

[SanBarrett]

Methods to determine if a car's primer is exposed include: 1. Visual inspection, as the primer's color contrasts with the car's paint, creating a noticeable color difference; 2. Run a fingernail over the scratch—if it feels slightly rough and indented, it indicates the primer is damaged; 3. Check if the scratch area has rusted. The main functions of the primer are: to enhance the smoothness of the car's surface, making the color paint appear fuller and adhere better. Methods for maintaining car paint include: 1. Promptly remove dust from the car body to minimize static electricity's attraction to dust; 2. Rinse off rain stains with clean water after rain; 3. When wiping, follow the direction of water flow from top to bottom.