Dual-Ghia car cover is not just a sheet draped over a car. With a rare coachbuilt that marries an American chassis and Italian coachwork, the right-spec cover is a passive protection system that lets the car sleep for weeks or months while keeping its presence intact. Many owners in the United States have felt that pang when lifting a cover after a long pause: a faint musty breath from the cabin, small mildew specks lurking in the soft top’s folds, unusual speckling on chrome edges, and a few dull halos on the paint. This article goes deep into the root causes behind those “invisible” issues, explains why thicker covers trap more moisture, shows how to set up a safe storage environment, and...