How Do You Make A Fiberglass Mold Over Plastic Plugs?
In mold making, a plug is simply another term for the positive model object used to create a negative mold impression. Plugs can be made from a variety of materials, including Styrofoam, clay, balsa or even plastic. Most often, plastic plugs are pre-existing objects, like model parts or plastic costume pieces, from which copies can be made. To make a casting-quality negative impression of a plastic plug from fiberglass materials, you will need to create a two-part mold. Prepare a clean, well-protected and well-ventilated work area, as fiberglass molding materials are highly toxic and stain easily. Place your plastic plug, or plastic template, onto a covered surface. Find the middle line of the plastic plug, from one side of the base to the other, and press a thin wall of modeling clay along this line, all the way around your object. Make the wall as smooth as possible. Apply several layers of wax mold release to both sides of the plastic plug, buffing each layer until it is smooth and
