From my inspection I found the misc fuel and brake line clamps were cut and formed from Galvanized sheet metal. They were then either DYED/Stained(Google for Metal staining dye) or Painted with different colors to signify different applications for the assy line workers.
FYI, Anodizng is a process only done to aluminum!!!!!!!!!!!!
70 R/S Z-28, 70 SS L-78, 70 R/S SS L-48 (all 4spds)
69 COPO "Recreation"