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The Pontiac GTO was relaunched in the United States in 2004, based on the Holden Monaro's V platform. AUTOart is striving to achieve a new standard by launching its first 1:18 die-cast model with a polished aluminum body in the form of the Ford Shelby GR-1 concept car. Die-cast model cars are usually cast using zinc alloy, a user-friendly material with a low melting point and easy to cast. Very few model makers have tried to cast aluminum alloy and then manually polish to achieve a high gloss surface finish.
In order to replicate the polished aluminum finish of the real car, actual aluminum alloy must be used to cast the scale model body. The final polished aluminum body is deliberately not coated with a clear protective layer in order to simulate the bare aluminum texture of the concept car.
Beautifully crafted 2004 Red Pontiac GTO Diecast Model Car features opening doors, hood, trunk and steerable front wheels.

Normally manufacturers would apply chrome-plating to the zinc cast body to simulate the finish.
The casting will then require more than 130 minutes of trained manual labor to polish the whole body-including the panels - until the desired glossy finish is achieved. A great addition to any collection. Pontiac Diecast Model Cars - The Bonneville was introduced as a limited edition Star Chief convertible with a real distinction - Pontiac's premier fuel-injected engine. Aluminum alloy, on the other hand, has a higher melting point and the molten material will attack the mold during casting, shortening the mold life by 20 to 50 times when compared with zinc alloy casting. However, chrome-plated surfaces are too bright and do not accurately replicate the surface texture of a polished aluminum finish.
The biggest challenge is to align the contours between the main body and the attached panels (bumper, bonnet, trunk and doors) after polishing.
To compensate for this some makers would polish the zinc cast body to achieve somewhat the same glossy finish of polished aluminum.

Even slight over-polishing of the bonnet and door edges will make the connecting surfaces of the main body uneven and such parts will need to be scrapped. John DeLorean took the wheel and endowed Pontiac with its cache as a Muscle Car and made performance a new priority. This makes the zinc polished surface appear wrapped in a thick, clear layer that looks unreal compared to the actual finish of the real car. With labor costs rising in China, the overall cost of producing a polished aluminum body is 5~6 times that of the usual painted body cast in zinc alloy.

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