I just applied Future on a WWII German AFV model (a 1/35 Hetzer). It noticeably darkened Dark Yellow base coat. I applied Future on a few WWII Russian AFV models in the past but didn't notice its darkening effect (probably because Dark Green is already dark enough).
My questions are, "Is Future supposed to darken the base color?" and "Will a matte varnish restore the original base color?"