So.i decided to 3d print most my armor so my second step behind the helmet was arms and shoulders. Luckily the mirage core is simple and odst shoulders are easy. Almost All armor parts are held to me by elastic bands but the shoulders I use velcro to keep them in place on the undershirt. The elbow pads are sown on to a elbow insert that already made for the undershirt that's just a combat top. After 3d printing I barely sanded anything. I applied three layers of pasty dip spray and two layers of druck bed liner. This covered the lines and gives a hard shell. All the parts are backed in eva foam to give it padding and some extra structure