Mike .
Have you considered minimum intervention so far as blasting is concerned. Surface conditioning and anti rust treatment leaving as much of the original paint on the artifact as possible then over spraying ???
That leaves the original paint intact and available for future archaeologists. WW!! paint and the paint history of vehicles is fast disappearing.
If you have large enough areas of good paint you might try getting a spectrograph of it. If the white is the same as the US army Tank white I have a sample of that.
Gina
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