There is white paint in my house that is nothing like as white as it was when I applied it fifteen years ago (non smoking household). The Otter is over 70 years old and has been through a war and lived outside for a good part of its life. I understand that the paint example above was reasonably well protected from degradation but I still don't think that it can have been immune from aging.
It is documented that MOST British AFVs were specified on the order to be painted inside with paint which had an aluminium based pigment but that fairly early in the war we ran low on that paint and quite a lot of Valentines (at least) were painted white inside from new. I would have thought that Canada would have been a bit less subject to war shortages than Britain and so less likely to need to deviate from specification. It should be possible to find what the order for Otters actually specified.
David
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