How can I put 2 different materials on one mesh?

You can do it in Blender but remember that this won't be imported into the game. Studio only takes the mesh data (structure) into the program. Any texture you want to give to your object needs to be assigned as a texture in the correct spot of the UV template of your mesh. If you want one part of your mesh to be metal you need to unwrap that part and paint its uv with metal texture, the other part of your objects can be assigned a different texture on top of the UV.


*Ignore the info below if the above solved your problem*
I'm not sure if this is what you're asking. As I told you before you can assign different materials in Blender to different parts of the mesh. Asuming you know how to asign one material, go into Edit mode and select the part of the mesh you want a different material (color). In the materials tab you would now see an area where it says assign. This will assign the selected material only to the part of the mesh selected. You can create as many materials as needed. See HERE for further info. THIS WON'T HAVE ANY EFFECT IN STUDIO OR THE GAME and will not texture your object unless you bake the textures into a map and import that into studio.