Decided to design & print on my 3D printer the caps for the wheel nuts. The links to the STL & gcode files are below the video.

The wheel bolt caps had been designed in Autodesk 123D. Here is the link to the project file:
wheelnut-cover.123dx

And here is the link to the STL files. Two STL files. One for the bolts with the code (locking bolt), and the other is for the rest of the bolts:
wheelnut-cover-code.stl
wheelnut-cover.stl

Here is the link to the .gcode files. These had been sliced in the Slis3r and are ready to be printed. Two caps in each gcode file:
2x-wheelnut-cover.gcode
2x-wheelnut-cover-code.gcode

Below is the comments section. Please, leave a comment if you have any questions.