I picked up the quarter emblems from the laser shop today! I dislike the original Mach I emblems so we tossed ideas around and came up with these. I made a set of 3½" slightly domed aluminum emblems, sanded them for an age with 800 grit, had them anodized and then laser "milled" 0.2mm deep with an industrial laser.
Drawing the 2D logo first in Corel Draw and then in 3D (Solidworks) was the worst part and probably took 6 hours...

You can convert simpler 2D geometries fairly automatically in Solidworks but this came out as more than 3.500 splines and had to be handled area by area...
The emblem will be recessed into the qtr panel.