Wonder Woman's "lasso of truth" belongs to the leather strap, according to all pictures I know, it should be golden. It is created on the same rigid group as this specified part of the leather strap. Textures and normalmaps are made manually. To get the same metallic effect, connect the color input of the glossy shader to the output of the texture, reduce roughness to 0.1, delete fresnel and use a fixed value of e.g. 0.7 for the diffuse/glossy mix node. The transparent node is not used.