Which action should be performed after sanding and before painting to ensure a good finish?

Which action should be performed after sanding and before painting to ensure a good finish?

• A. Clean the surface thoroughly
• B. Apply filler again
• C. Mask the area completely
• D. Skip priming

Answer: (A)

After sanding, the surface must be cleaned thoroughly to remove dust, oils, wax, and other residues. Sanding creates fine particles that can get trapped in the paint film, and any oils from hands or cleaners can prevent the primer and topcoat from bonding evenly. Cleaning with a tack cloth and a appropriate solvent or wax-and-grease remover, then allowing the surface to dry completely, ensures the surface is truly smooth and ready for primer and paint. When the surface is clean, the paint can flow evenly and adhesion and final appearance are improved, reducing the risk of texture, pinholes, or peeling later. Masking should be done after cleaning to protect areas not being painted, and priming remains important where needed, but cleaning is the essential step that directly enables a good finish.

After sanding, the surface must be cleaned thoroughly to remove dust, oils, wax, and other residues. Sanding creates fine particles that can get trapped in the paint film, and any oils from hands or cleaners can prevent the primer and topcoat from bonding evenly. Cleaning with a tack cloth and a appropriate solvent or wax-and-grease remover, then allowing the surface to dry completely, ensures the surface is truly smooth and ready for primer and paint. When the surface is clean, the paint can flow evenly and adhesion and final appearance are improved, reducing the risk of texture, pinholes, or peeling later. Masking should be done after cleaning to protect areas not being painted, and priming remains important where needed, but cleaning is the essential step that directly enables a good finish.