Draw a simple oval for the head
Add a narrow jawline and chin
Sketch the helmet outline around the head
Draw the eye slits
Add the mouth slit
Outline the neck
Draw the shoulders wide and angular
Sketch the chest armor shape
Add the arc reactor circle in the center of the chest
Draw the upper torso plates
Add the arm outlines on both sides
Sketch the biceps and forearm armor segments
Draw the gauntlets and hand shapes
Add the leg outlines
Sketch the thigh and shin armor plates
Draw the boots
Add panel lines and armor details
Refine the helmet edges and facial features
Erase extra guide lines
Ink the final lines
Color the suit red and gold
Add silver or gray accents
Shade the armor for depth