Red Seal Automotive Refinishing Technician Practice Exam

What adjustments can be made if a spray gun is producing a heavy mist?

1. Change the type of paint used

2. Adjust the air pressure and fluid flow settings

3. Increase the distance from the surface

4. Decrease the speed of application

The correct answer is: Adjust the air pressure and fluid flow settings

A spray gun producing a heavy mist can indicate that the atomization of the paint is not optimal, which can affect the quality of the finish. Adjusting the air pressure and fluid flow settings is a practical approach to addressing this issue. Increasing the air pressure can help create finer atomization of the paint, reducing the size of the droplets and thereby minimizing the misting effect. Simultaneously, adjusting the fluid flow setting can control the amount of paint being delivered, allowing for a more precise application. Striking the right balance between these two adjustments can lead to a smoother finish and reduce overspray. Changing the type of paint might seem viable, but if the existing paint is suitable for the job, it isn’t a necessary first step when misting occurs. Increasing the distance from the surface could also help, but it may not address the fundamental issue of misting related to gun settings. Decreasing the speed of application could potentially worsen the exposure to mist as it may lead to more paint being released in a less controlled manner.