I need help understanding EVA foam for pieces of armor
(Pictures are not mine)
Hello. I'm interested in working on a Sheik (from LoZ) cosplay, which is a character that has a bit of armor, mainly on the upper arm, thighs, and calves, as well as small shoulder pieces, depending on whether I decide to do them or not. I'm thinking about mixing a bit of elements from Sheik's OoT design and Sheik's Hyrule Warrior design. Meaning, I'm thinking of making her OoT white, ripped shirt with the Sheikah eye, hair cap and mask (white) , as well as other white bandages and mixing it with her HW pieces of armor design. My idea is just buying a tight dark blue sports shirt (long sleeved), as well as a tight dark blue sports pants, using those, and placing all the armor and white fabric details over my clothing. I don't want to sew them on the sports clothing, I'm thinking about using some straps or strings to keep them in place (for example, the red strings Sheik has on her HW design). It will be my second cosplay ever, so I don't feel confident sewing a full body suit, that's why I'll go with this option.
The thing is, I wanna know more about how to make her armor pieces with EVA foam, mainly when it comes to the details. Some of the pieces have a small sheikah symbol drawn on it, or have a white outer lining, with the rest being blue. How to paint/do it like that?
For starters, how do I get the foam pieces to have that small outer lining "volume" as it is shown on these pieces on this photo I found on the internet? I can't find any pattern for Sheik armor anywhere on the internet, so I'm unsure on how to do these little details and the overall shape.
Thanks in advance, guys!