What should be applied to the interior side of door repairs to protect against weather exposure?

Applying a top coat and primer to the interior side of door repairs is essential for protecting against weather exposure. This treatment creates a barrier that inhibits moisture penetration, which can lead to rust, corrosion, or deterioration of the door material. The combination of a primer and a top coat ensures that the surface is not only protected from the elements but also helps in enhancing the adhesion of the paint, providing a longer-lasting finish.

A primer works to seal the surface, creating a uniform base that enhances the effectiveness of the top coat, while the top coat itself provides an additional layer of defense against moisture, UV rays, and other environmental factors that might compromise the integrity of the repair.

Other options that suggest only paint, no treatment, or sealing with tape do not provide adequate protection against the elements. Relying solely on paint without a primer may result in poor adhesion and durability, and neglecting treatment altogether leaves the repair vulnerable to weather-related damage. Using tape may not create a robust barrier needed for long-term protection. Therefore, the comprehensive approach of using both primer and top coat is vital for the durability and effectiveness of door repairs in the face of weather exposure.