Which tool is typically used to spread wax in a thin coating?

The wooden applicator is the correct choice for spreading wax in a thin coating. This tool is designed specifically for this purpose, allowing the technician to achieve an even application of wax across the skin. The structure of the wooden applicator makes it ideal for controlling the amount of wax applied and for reaching various areas of the body effectively.

Using a wooden applicator helps to ensure that the wax is spread thinly and uniformly, which is crucial for effective hair removal and for minimizing discomfort during the process. Its flat edge enables precise control, reducing the chances of applying too much wax, which can lead to a messy application and ineffective hair removal.

Other options like brushes and spatulas may not offer the same level of control and precision for wax application. While fingers could technically be used, they lack the cleanliness and hygienic advantages that a wooden applicator provides, making it less suitable for professional settings. Therefore, the wooden applicator stands out as the preferred and most suitable tool for this task.