How to Determine If the Car Paint Has Exposed the Primer?

[McAndrew]

Methods to determine if the car paint has exposed the primer are as follows: 1. Use your fingernail to scratch the mark and feel the indentation. If the scratched area can catch the sliding of your nail, it indicates the scratch is relatively deep, and there is a high possibility that the primer has been damaged. 2. If you only feel a slightly rough indentation, it generally means only the surface paint has been scratched, and the primer remains intact. In this case, polishing and waxing will suffice. Precautions for car paint repair: 1. Do not use water other than soft water for cleaning, including hot water, alkaline water, and water with high hardness. 2. Avoid washing the car under the scorching sun, and never wash the car immediately after the engine has cooled down, as this can lead to premature aging of the engine. 3. Do not use high-pressure water streams to wash the car body. 4. Avoid using random stain removers.