Excerpt from Designing, Modeling, Building a Model Automobile
In the design studios of the automobile industry, new designs are worked into plaster models. The following instructions are adapted from the methods used by professional automobile model makers.
In casting your model car in plaster, there are just two major steps (1) Making a 5-piece plaster mold, using your clay model as a pattern – and (2) Pouring wet plaster into this mold to form an exact duplicate of your clay model.
The only material you will need is about 25 pounds of ordinary molding plaster – which you can buy from almost any builders’ supply company. Mix this plaster in water until it is as thick and smooth as heavy cream.
To make the mold, place your clay model on a ﬂat board which has been painted with several coats of shellac (fig. To prevent the plaster from sticking, coat the board with grease or soap jell.
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