Ironscale is one of many choices for skins for the character in Shyvana in League of Legends. Cosplayer Tayla Barter, also known as Kinpatsu Cosplay, replicated the Ironscale over a long period of time. The armor is comprised of several detailed pieces, and it took Barter 90 hours over the course of six months to complete the build. It’s the biggest armor-focused project she’s done to date.
Most costumes I’ve seen like this are made from Worbla, but Barter used a mix of EVA foam and other thermoplastics. You can see the basic construction of the breastplate in progress photos below. All the dark gray/black pieces are foam while the light gray portions are thermoplastic. When she finished constructing the entire set of armor, she painted it with acrylics and oil paints. Acrylics were used for the base colors, and the oil paints were used for shading and highlights.
Top photo by GiantShev Photography