The smaller grille emblem that I have is chrome plated, but the surface has a "brushed aluminum" look, yet the outside edges have shiny chrome finish. If you compare this emblem to the Skylark GS ventiports, the surface has the same finish as the inserts to the ventiports, while the outside edges has a smooth shiny chrome finish. I don't know how they did it back then, but it works.
Is it time to move this topic to another section?
John Egel