I thought this was a very cool. PDF output from MoI can be laser printed, even in color, and then fused with a
laminator to powder coated aluminum. I think Home Depot has the aluminum in the roofing department.
The Mirror command will reverse text.
For transferring engraving designs to metal I use a laser print on plain paper, acetone, and a bit of burnishing. It works very well, though the technique described may be superior.