I sometimes get asked for a tutorial on how I made my 1 week iron man costume, but like most things on the internet, someone’s already made a better one!
http://www.xrobots.co.uk/
Here’s some videos he’s made that I think are particularly good:
This technique would also be fantastic for anyone making halo armour. He uses PVA coating and various paints while I used PVC fabric stretched over foam, but I think his technique is much better for a beginner with armour, and has many advantages (like the way it treats curves and strength) that PVC doesn’t.