There are four models in the scene the MIELE H2860BP oven in four colors black white graphite and black with brushed steel. The oven consists of many elements everything is assembled into one object and multimaterial is assigned. All materials were renamed and simplified as much as possible I converted Corona Render materials and then adjusted them in the scene for rendering.

The FBX file contains all models with materials. There are no materials in the OBJ file only geometry.

Who works in the 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. Choose Blinn Phong or Ward – which is preferable for you.