Do you seal/varnish your models? The third (some of the first) as he said does have the chalky look could be from that....the second has none of the elements of that.....I had some figures have the chalky look when I sealed some figures, it was either the weather or the can was old...had to touch them up to fix the issue.
They all look great and the color combos are striking....the Fury figure is by far my favorite of this batch!
I tend to use Citiadel and Foundry paints....I really like the Foundry paint lines with the three tone choices.