The Ghost Car auction will take place 30 July in Michigan A transparent car made of Plexiglas from Rohm & Haas is set to fetch up to half a million dollars at an auction in Michigan later this month. The ‘Ghost Car’ is a Pontiac Deluxe Six built in 1939 by General Motors and Rohm & Haas and was the first transparent full-sized car to be made in America. A spokesperson for RM Auctions, which is selling the car 30 July, told UK newspaper the Daily Mail: 'The car is in a remarkable state of preservation. It's a testament to the longevity of Plexiglas in an era when automotive plastics tended to self-destruct within a few years. Although it has acquired a few chips and cracks, it is structurally sound and cosmetically clear, showing off the Ghost Car's innards as it did in 1939.” RM Auctions say the car will fetch about $475,000 (Ј300,500). The car was originally built for the 1939-10 New York World’s Fair and was displayed on General Motors’ ‘Highways and Horizons’ pavilion. To make the car, Rohm & Haas copied the design for the Pontiac four-door Touring Sedan to make a Plexiglas body. The body went over a metal structure that had been given a copper wash. The car was completed with rubber mouldings and tires, both painted white. The engine has a three-speed transmission, a six-cylinder engine, coil spring independent front suspension, live rear axle with semi-elliptic leaf springs and four-wheel hydraulic drum brakes Rohm & Haas invented Plexiglas in 1933 when the company experimented with polymerizing MMA between two sheets of glass. Rohm soon realized that the acrylic layer separated from the glass to form a solid sheet of plastic – PMMA. During the war, Plexiglas became popular as a replacement for glass in aeroplanes. The Ghost Car auction will take place 30 July in Michigan, the US. Interested parties must buy an official auction catalogue for $100 and can view the car on 29 July and the morning of the auction day itself.