How can one ensure a fully developed fan pattern when spraying gel coat?

To ensure a fully developed fan pattern when spraying gel coat, gradually increasing pressure in increments of 10 psi is the optimal approach. This method allows for fine-tuning the spray pattern and achieving consistency in the application of the gel coat. By making incremental adjustments, the operator can observe how changes in pressure affect the spray, allowing them to find the ideal setting that produces an even and well-defined fan pattern. This controlled method facilitates a balance between atomization and coverage, resulting in a professional finish.

Increasing pump pressure rapidly can lead to erratic spray patterns, causing a lack of control over the process and potentially resulting in uneven application. Maintaining zero pump pressure is counterproductive, as it prevents the gel coat from being atomized properly, leading to thick, unmanageable application. Continuous spraying without any adjustments can also hinder the ability to adapt to changing conditions, such as varying viscosity of the gel coat or alterations in the working environment, resulting in a subpar finish. Thus, the process of gradual pressure adjustment is crucial for achieving the desired results.