The term 'FIRST COAT OF PAINT' can be summarized as the application of a PRIMER, which is a 6-letter word. A PRIMER is a preparatory coating that is applied to a surface before painting. It helps to improve adhesion and provides a better finish. Primers are often used on new surfaces, such as drywall or wood, to ensure that the paint will adhere properly. They also help to seal porous surfaces and protect them from moisture.