Mattson, Fred: - Fred Mattson began working on car interiors as a teenager in the 1970s by hand stitching inserts into his own 1969 Oldsmobile and working on several friends' cars in his neighborhood. Soon after opening a full-time upholstery business in 1980, Fred's auto trimming career expanded to sewing car interiors for many prestigious upholstery shops and restoration specialists in the metropolitan area of the Twin Cities, in Minnesota.