In this instructional how to video, mold making technician Milo showcases the "squish mold" technique, which is very common for making thin-walled castings such as casings and enclosures, or in this case a model car body.
He then makes an attractive bronze metallic casting from this mold using high-performance TASK 4 urethane plastic. TASK 4 is the perfect choice for a thin-walled craft casting like this, as it remains strong even at less than 1mm thickness.