How to Determine If the Primer is Damaged?

[StRylee]

It can be observed with the naked eye. Methods to determine if the primer is damaged are as follows: 1. Primers are usually black, gray, or white, and these colors are generally opposite to the car paint color. If the car paint is scratched, there will be a noticeable color difference. If the scratch penetrates to the primer, it can be clearly seen. 2. You can run your fingernail over the scratch to feel the depth. If it feels slightly rough with a shallow indentation, it usually means only the surface paint is scratched, and the primer is intact—polishing and waxing will suffice. If the scratch can catch your nail as it slides, it indicates a deeper scratch, and there's a higher likelihood the primer is damaged.