Just wanted to share, photo probably does not show it completely but I once asked you guys about problems with varnishes, especially how "contrast medium + AK ultra matt" would result in desaturated, grayed out colors and "frosty" look. So I picked up two years old training marines (they were painting practice) and tried first few combinations I wanted to try - Vallejo (new?) matte with just little water from brush, Vallejo "premium color" matte also with little water, Vallejo "mecha color" matte in two variants - one 5-1 mixed with their airbrush flow improver (makes sense since it's airbrush varnish in theory) and another mixed 1-1 with just plain water and finally attempt to fix problem with ultra matt by just mixing it in equal proportions with AK normal matt varnish (so 1-1-2 of ultra matt - matt - GW contrast medium). All applied by brush. Tldr: turns out that just adding that normal matt was enough to get no change in color and nice, matte surface (not completely matte but visibly uniform). That easy, huh?

Vallejo normal matte ended somewhat glossy/satin but maybe it dries really slow. Premium color similar but more matte, it might be just me but also appears to intensity colors slightly. Mecha matte with flow improver dries visibly faster than previous two, some parts appears little "melted" (similar to too thick paint sections) but most have good matte effect. Variant 1-1 thinned with water was disaster - pool markings, random frosty effects, random glossy sections, etc. And mentioned AK ultra + normal matte, best out of these and dried fastest too. As a bonus, another try for Mr Hobby GX UV cut, with their thinner, on test plastic piece, thinned only slightly with their thinner and again it ended with instantly melted, previously cured paint and window wide open to get rid of the smell. I'm convinced that these scale modellers were trolling me. Only thing left is trying gouache varnish (it uses white spirit as thinner) I guess.

Sorry for lengthy post.