Another job that I was asked to do recently was to create badges for a scale model of a Fordson Super Major tractor. The largest badge was only to be about 103mm in length with fixing holes for securing.
After machining and a quick outer polish:
I only have Honda orange enamel for filling, but I think that it came out pretty close to the original. The Super Major text was then lightly filled with black and 'polished out' to try to recreate an authentic weathered look: