Thanks. The chest COULD use a bit more detail, but based on my reference photos, there's not much else to do. The chest only has a few seperate surfaces. I'm not done in any way, so maybe I'll find more to do.
I'm planning on getting the arc reactor on eBay, it's very detailed, so I think it going to be my centerpiece for the chest. It's gonna be my reward , I'm only going to buy it if I complete the entire suit. Good motivation.
As for the foam, it's pretty ridgid once it's built into it's shape, it can flex, but it doesn't flex much.