The ORIGINAL CORRECT Plating did NOT come out of a can. The Original Plating was Zinc Phosphate or Ive seen Darker Examples that might have been MANGANESE Phosphate.....
Now having said all that, IF you dont care about Concours Judged accuracy, MANY nice cars are done with a variety of MIXED, Blended together coats of Flat Black and Cast Blast paint ......fogged on DRY!!
Search resto subject also at Camaros.net
70 R/S Z-28, 70 SS L-78, 70 R/S SS L-48 (all 4spds)
69 COPO "Recreation"