A photo-etched detail set for the A-36 Apache model in 1:72 scale from Brengun is an accessory to a kit you have already bought, not a model of its own. It replaces selected plastic parts with thin metal and adds detail that cannot be made by injection molding.
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An aftermarket accessory from the Czech company Brengun. On a sheet of thin photochemically etched metal are parts cut for one particular Brengun kit. The set is not a model or a kit in itself; it serves to complete a model you already own. The aim is to raise the level of detail where injection molding in plastic runs into its limits.
Etched sheet has a thickness in tenths of a millimeter, whereas a plastic part has to be markedly thicker for the sake of strength and of the way the material flows in the mold. In 1:72 scale that difference shows at first glance: an instrument panel, seat belts, grilles, bulkheads or frames come out of photo-etched metal thin and sharp, while their plastic counterparts look soft and rounded. Pressings and micro-relief that cannot be engraved into a mold can also be made in photo-etched metal.
Separate the parts with a scalpel on a hard surface; never break them out, or they will bend. Make the bends in a bending tool or between two blades, and a light score from the inside helps create a sharp edge. A stiffer piece can be softened by brief, careful warming over a flame; once it has cooled the material is more pliable. Degrease the metal before painting and apply a primer, otherwise the paint will not hold. It is bonded with super glue applied in a microscopic amount, ideally with a pin or a wire, because ordinary cement for plastic does not work on metal.
The accessory is supplied on its own and unpainted. The kit, paints and glue are not included in the package, unless stated otherwise.
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