How must a primer or sealer be applied across a wood surface to ensure proper preparation?

• A. It must be applied in an equal and sufficient quantity over the entire surface.
• B. In random patches to avoid buildup.
• C. Only at the edges.
• D. As a thick film in the center

Answer: (A)

The main idea being tested here is that primer or sealer must be applied evenly and in a sufficient amount across the entire wood surface to prepare it properly. When you lay down a uniform coat, the porous wood gets sealed evenly, provides a consistent base for the topcoat, and helps prevent blotching or uneven absorption. If the application is patchy or concentrated only in some areas, you’ll end up with spots that absorb differently, leading to an uneven finish and potential adhesion problems. Applying only at the edges leaves the center unsealed, which can allow tannins or grain variations to show through and disrupt the final look. Conversely, a thick film in the center can cause runs, longer drying times, and an uneven surface. By ensuring an equal, adequate coverage over the whole surface, you create a stable, uniform foundation for primer and paint to perform properly.