Signboard decorative letters BAR, Aliexpress
Letters yellow https://alii.pub/71nz23 
Dark letters https://alii.pub/71nz4t 
The model is made under Turbosmooth, the modifier is enabled (display in the viewport - 0 iterations, on the render 1 iteration), in the OBJ file Turbosmooth is disabled
Materials CoronaPhysicalMTL, CoronaLegacyMTL=CoronaMTL, Vray
Corona version 11
In CoronaRender versions 6 and below
CoronaLegacyMtl requires Corona Renderer version 1.5 or higher, as the maps are designed to use PBR (roughness-metallic)
Vray version 5
Vray materials are obtained using Vray-converter
Those who work in V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than 3.1, then the BRDF field will be empty. Select Blinn, Phong or Ward - what is preferable for you.
All maps are designed for the PBR roughness-metallic workspace.
Textures and materials have logical names
Texturing UnwrapUVW