[FirstOwner69]

The 69 and 70 grilles were both egg crate. The 70s had raised areas on the horizontal black "bars" that had an almost chrome appearing finish as shown in the brochure picture above. The 69 horizontal bars did not have raised areas, and the egg crate was all silverish paint.

My 69 inner and outer grilles were replaced with GM replacement parts in early 1972 after I was hit by a reckless driver. The inner grille was the 1970 design, and the outer was not quite right for either year. Below is a picture of that setup taken in 2010 that shows the silver almost worn off.

I believe if you paint the raised areas silver as you suggested, you will be very close to what it would have been new.