Kadmon

These are awesome conversions! To provide ideas for others, I've linked this topic in our article about the Mega-Gargant, and I'll also link it to the non-mega Gargants when I'll finish that article: Mega-Gargant (AoS) kit for Warhammer: Age of Sigmar

I use Pinty Plus - Evolution matte spray varnishes and Pentart brush-on glossy varnishes. I've never had any frosting with either of these. However, if you take care of your models, you don't need to use varnish. I haven't used contrast paints yet, but I can imagine that matte varnish could dull the effect. A friend of mine uses only Citadel paints, and never varnishes his models, but they look fine (although he doesn't play with them daily). Here's my article with where I've collected varnishes recommended by others: How to use miniature varnish - Miniature hobby guide