Paint your decals, you'll be happy you did later. The effect is much better. I stencil'd mine, let me know if you need any advice on how to do that. RafalFett has some nice templates up in the armor section.
Nice work so far!! The backplate's gonna be a hard road to overcome, but it looks like you have everything under control. Great paint so far, especially with the gauntlet to chest armor comparison.
What are you using for the backplate? You could probably make your knees with big enough pipe if you make them with two pieces. Seen some ABS and FG that were two pieces.
Looking outstanding so far. So you three leveled the paint? Silver, yellow, then the green with the masking fluid correctly applied in between?