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

[DeAutumn]

Gently touch the scratch with your finger; if there is a noticeable unevenness, it indicates that the car's primer has been exposed. Below is an introduction to the primer: 1. Function of the primer: The car primer is a layer of paint applied to the body. Generally, only after the primer is sprayed can the next painting process proceed. As a primer, its primary role is to protect the car body. The primer comes into direct contact with the body, which is mainly made of metal. This requires the primer to have excellent anti-corrosion and anti-rust properties, as well as good adhesion, including adhesion to both the body and the topcoat. 2. Types of primer: Currently, primers can generally be divided into dip primer, water-based dip primer, anodic electrophoretic primer, and cathodic electrophoretic primer. Most passenger cars use cathodic electrophoretic primer, typically in white or gray, depending on the vehicle model. For example, black cars usually use white primer, while white cars opt for gray primer, mainly to make it easier to identify the primer when the paint is scratched. 3. Timely repair of the primer: If a car is scratched, regardless of whether the primer is exposed, it is recommended to repair any deep scratches to prevent rusting over time, which could further affect the appearance. If the metal shell is scratched and the primer is exposed, it will not rust. However, if the metal is exposed, even a small spot, it should be repaired promptly. Otherwise, the affected area may expand.