Red Seal Automotive Refinishing Technician Practice Exam

What type of defects can occur if the clear coat is applied too thickly?

1. Peeling and blistering

2. Fading and discoloration

3. Runs, sags, and an uneven surface texture

4. Chipping and flaking

The correct answer is: Runs, sags, and an uneven surface texture

Applying a clear coat too thickly can lead to a number of specific defects, with runs, sags, and uneven surface texture being the most common. When the clear coat is overly thick, it creates an excessive layer that may not dry properly. This can result in runs and sags as gravity causes the excess material to flow down the vertical surfaces of the vehicle. Additionally, the surface may appear uneven or textured rather than smooth, which detracts from the overall finish and appearance of the vehicle. Understanding the implications of applying too much clear coat is important for achieving a professional finish and maintaining the visual quality of automotive refinishing work.