I actually used Gravi Tex plus first Black then White, then bought a can of Duplicate-color black/aqua to dust it to give it a green tint. Then used an aerosol can of clear to finish it off.
I paint flat black first, then use the AC Delco aqua splatter paint (rattle can), then cover it with a flat clearcoat.
Inspiring work by all. It's on my list of things to do on my '67 'cat, too. I'm not worried about originality, wondering if some of the aftermarket Impala sheet metal could be made to work? Devon