Carefully put the other large turtleneck shirt on your dummy. You can use straight pins to keep it tight around your pirate's neck and cover up all the duct tape. Tie the shirt in a knot at the bottom to keep it from sliding up.
Put the mask on the Styrofoam head and secure it with pins. You can fill out the mask with batting but first tape up the holes in the mask.
We covered the eye holes with masking tape from the inside then added an eye patch on one and drew the other eye with markers.