ASE Painting and Refinishing (B2) 2025 – 400 Free Practice Questions to Pass the Exam

Primer sealers are generally not sanded as part of the standard preparation process. The primary function of a primer sealer is to provide a smooth, adhesive foundation for the topcoat by sealing the surface and improving the bond between the substrate and the paint. Sanding can disrupt this sealing effect and may lead to a less effective coating application or adhesion issues.

While there are specific situations where a primer might be sanded—such as if the surface has imperfections or if a particularly smooth finish is desired—this practice is not the norm. Most automotive and refinishing professionals rely on the inherent properties of primer sealers to provide the necessary base without the need for sanding, making option C the most accurate choice.

This approach ensures that the primer sealer functions effectively, allowing for an optimal finish when the top coat is applied, thus emphasizing the importance of understanding the role of primer sealers in the painting and refinishing process.