G'day; I thought this may be of interest to someone!

Cleaned 30 years' worth of gunk off the steering box to find a blue stripe:

P1.jpg


Here's some others I've found before they fade / wear away (1979 Adelaide HZ Kingswood):

Dipstick top:

P2.jpg


Pwr steer res cap:

P3.jpg


Bonnet catch:

P6.jpg


Brake valve bracket:

P4.jpg


Diff cover:

P5.jpg