1941-57 Chevrolet Car & Truck Blue Gray Engine Spray Paint. Generally takes 2 cans to paint engine. There are 2 different grays one is a dove or lighter gray and the other is a blue gray that is a darker and has a blue tone. There has been much debate about the colors and i have seen hundreds of original cars over the years and photographed many of them and there is no way to say it was always one way or the other so we made both colors. This is the dark blue gray.