the faux finish approach would be a consideration for sure. ;)
it is possible to create the look/feel of the barn doors and rusted metal wtdoor exposure. the faux finish approach can be effective on existing doors where you do not have clearance to apply aged barnwood.
of the finishes added to the face. The 4 horizontal panels are not visible in this photo but they are indeed there. This does add to the weight of the door but with a strong door opener even this is not an issue.