Metal does not stop being metal. The flakes may oxidize but they are still there. Look at Roderick's...you can see the metallic luster.
Yes, I have old metallic engine parts that have been subjected to heat that have retained their metallic. A 1968 intake, which was a turquoise metallic, not "Pontiac Metallic Blue". Also numerous OHC timing covers and intakes.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching
