What is the main reason for using a practice panel during color matching?

The main reason for using a practice panel during color matching is to test the blend and application technique before working on a vehicle. This approach allows technicians to gain confidence in their color matching abilities and to experiment with various techniques without risking the quality of a customer vehicle. By applying paint to a practice panel, the technician can evaluate how the color will look once applied, including how it blends with existing finishes and how different application methods impact the final appearance. This step not only ensures a higher standard of work but also helps reduce potential errors and the need for costly rework.