Red Seal Automotive Refinishing Technician Practice Exam

What is the main benefit of wet sanding compared to dry sanding?

1. Increased speed of the sanding process

2. Reduction of dust and heat

3. Greater removal of material

4. Better adhesion of paint layers

The correct answer is: Reduction of dust and heat

Wet sanding primarily offers the benefit of reducing dust and heat during the sanding process. When water is used in wet sanding, it helps to keep the sanding surface cool by dissipating heat generated from the friction of the sanding process. This cooling effect is essential because excessive heat can damage both the surface being sanded and the sanding tools. Moreover, wet sanding minimizes airborne dust particles, creating a cleaner working environment and reducing the inhalation of potentially harmful substances by the technician. The water acts as a lubricant, allowing for a smoother sanding action, which not only reduces the risk of scratching the surface but also leads to a finer finish. In contrast, while the other options touch on aspects like speed, material removal, and paint adhesion, they do not capture the most significant and beneficial characteristic of wet sanding in practical applications within automotive refinishing.