Andy
Thanks for your input.
I believe this tank has been in storage for many years and if used at all ~ (bought it off a reputable UK trader) and should not be faded at all.
I did not think it was a metal flake as it does not have that sparkle factor like the majority of others on this string. But I guess it could be a, perhaps a subtle factor ?
I learnt back inthe 1970s about metal flakes as I had an ALL Australian (Horn) Super car in its day. The Holden XU-1 ~ (Six cylinder- triple carbs- 4 speed- LSDm, all factory built ,) built in the days when touring car racing meant merely selling one 1000 units to retail to homologate/ qualify for premium touring car racing ~ What
a fantastic GO machine !
Anyway it was done in a metal flake ~ ever so subtle.. purple/ black ~ and the metal flakes of the day only lasted 3-4 years in the Ozz sun! They then went to crap ~
(Me with hair !

)