As managing director of the Automobile Manufacturers Association, Romney became good friends with then-president George W. Mason. When Mason became chairman of the manufacturing firm Nash-Kelvinator in 1948, he invited Romney along "to learn the business from the ground up" as his roving assistant, and the new executive spent a year working in different parts of the company. At a Detroit refrigerator plant of the Kelvinator appliance division, Romney battled the Mechanics Educational Society of America union to institute a new industrial–labor relations program that forestalled the whole facility being shut down. He appealed to the workers by saying, "I am no college man. I've laid floors, I've done lathing. I've thinned beets and shocked wheat." As Mason's protégé, Romney assumed executive assignment for the development of the Rambler.