It would need to be brought into a 3D app that can export .stl, .STL files for 3D printing, I ran into this problem before and I put it into Maya and it still had issues after cleaning up the .obj file, so if you could re-make that object in something like blender or Hexagon or any 3D "modeling" app, you will be a lot better off.

Do atleast one thing a day that scares the hell outta ya!!