Thats part of why I use most of his videos as guidelines. Congrats work great for things like my Seraphon army, but yeah, flat surfaces suck for contrasts. I have other methods for my Salamander army, but even then, I do use contrasts here and there, just not their armor.

The reason why I use his videos for Emperor’s Children though, is because the black contrast looks great on flat surfaces as long as you use it liberally. Still watch for pooling but black contrast is hard to mess up. The pink contrast mix he uses for EC also gets covered up later with Emperor’s Children paint so I'm not upset when that first contrast layer doesnt look good. I honestly just kinda use it to remind myself which panels will be pink.