What is the primary purpose of a primer in automotive refinishing?

The primary purpose of a primer in automotive refinishing is to provide adhesion between the substrate and paint layers. Primers are specifically formulated materials that create a strong bond between the surface of the vehicle and the subsequent layers of paint. This is crucial because good adhesion helps to prevent issues such as peeling, flaking, or chipping of the paint over time.

Additionally, primers can also contribute to the overall durability and longevity of the paint job by sealing the surface and creating an optimal base for the topcoat. While other features such as corrosion protection and color enhancement are relevant in the context of automotive refinishing, the fundamental role of primer is to ensure that paint adheres properly to the surface, thus facilitating a successful refinishing process.