I have a contact who worked on AOTC, he tells me that the Jango helmet and armour were made using fibreglass with an aluminium bound gelcoat, this means that the gelcoat contains real aluminium powder. In order to polish the surface you need to rub it with a fine wire wool, this creates a fine black powder that naturally produces a great weathered look, this may be the dust that is seen on the flightsuit.
I've done a test Boba bucket using this Aluminium based gelcoat and it turned out awesome! it really looks and feels like metal.
I only have this guy's word of coarse, but I'm more than happy with the test helmet that I've done.
