Vi League of Legends Shoes Tutorial by ShinjusWorkshop

Master Lee (makes Iron Man Armor suits professionally) Uses rivets and plastic, from my research into older styles this is actually very common place, as long as your medium is leather or harder you can use this method to create good movement in armor what kind of rivets you use is up to you but a rivet kit isn't that expensive and a good long term investment. Quit and easy way to attach things as long as you have holes with foam though you might just glue it to a inner spandex suit while attached to a duct tape dummy. That way you get the movement you want without the fuss. But foam isn't the best long term medium but if you don't plan on using the costume for too long it's a good way to go, just doesn't last sadly. If you can manage to tool it leather would be better for long term gives you great options for workability it's tough to cut but when painted it really can pull off a good metal look without having to use sheet metal and forming.