BucketHead1444...that's the Disguise MC helmet.
Dorfman, if you're looking to buy a helmet, check out the commercially available Disguise helmet. The quality is pretty good. Anyhow, Here's some stuff that I have made and some tips will follow:
So that^ is my Halo 4 MC build...I too used the disguise helmet, but scratch-built the rest of the suit from EVA foam. The trick with this suit is to bevel the edges where parts connect and use a dremel sometimes to smooth the beveled edges, assuring a perfect fit.
This is my Titanfall 2 Pulse blade helmet; made from EVA foam. one of the handiest techniques for this build was scoring the surface of the foam and heating it with a heat gun to open up the score cut, producing awesome detail. I used Andrew DFT's templates and modified them for accuracy upon making my own. Another trick for this one would be to (again) use a dremel and smooth out the outer edge of the foam to create a unique and "sculpted" effect, which looks really nice for additional layered details. just look at the chin are of the Titanfall helmet, there's where I "sculpted" the helmet a little.
Also, something I also do is very lightly trim off the sharp corners of the foam with a dremel. It makes the result look a little more "manufactured"
And remember, take your time, don't use a lot of hot glue, and have fun!
Check out AndrewDFT on youtube, he has some amazing videos to help beginners get started on armor.
PS- It's called Pepakura, not...*giggles*...Paprika.
I'm just teasing, I know your auto-correct is probably doing that.
hope this helps!
ask away!