What is a 'cut-in' in the context of auto refinishing?

A 'cut-in' in the context of auto refinishing refers specifically to a method of painting where edges and corners are addressed first before larger areas. This technique is essential for ensuring that the paint adheres properly to all surfaces and creates clean, sharp lines, particularly around moldings, seams, and other fine details. By initially focusing on these areas, the painter can prevent paint from bleeding into adjacent surfaces and ensures a more precise application, which is crucial for achieving a professional finish.

The other options do not accurately define 'cut-in.' Measuring paint viscosity is a different process that evaluates the thickness and flow characteristics of the paint, unrelated to the actual painting technique itself. Applying undercoats is part of the preparation process, but it does not specifically pertain to the detailed painting technique of cut-in. A style of painting involving multi-color designs describes a different artistic approach, which does not relate to the specific focus on edges and corners typical of cut-in work.