What is the initial step in setting up a spray gun for gel coat application?

The initial step in setting up a spray gun for gel coat application is starting at zero pump pressure. This approach allows the user to gradually increase the pressure to find the optimal setting for the specific material being sprayed. By beginning at zero, it ensures that there is no overspray or uncontrolled spraying that can occur with higher initial pressures, allowing the operator to properly assess how the gel coat behaves as pressure is adjusted.

Starting from zero also promotes better control over the spray pattern and material flow, which is critical in achieving an even application of gel coat. This is essential to avoid defects on the surface being coated.

Other choices suggest either arbitrary pressures that could be too high or prioritizing adjustments that come later in the setup process. These approaches could lead to difficulties in managing the application and ensuring a quality finish.