Automakers will use 350 million pounds of reinforced thermoset composites in 2001 and 467 million by 2004 - a 34 percent increase in four years - according to the Automotive Composites Alliance (ACA), an industry association of 25 moulders, raw materials' suppliers and toolmakers. "The use of reinforced thermoset composites by automakers has nearly doubled in the last decade, largely because composites have increasingly been chosen by automakers to replace steel for body panels and structural components," says Mike Dorney, ACA chairman and vice president of sales and marketing for The Budd Company Plastics Division in Troy, Mich.