This is what I thought at first - but - the lines follow the figure so precise Here is what a good one looks like.
To my old eyes it looked like someone scratched an outline with something sharp. They're not good enough to see if it's raised. If so, not grafitti-didn't mean to sound smart.
Just checked - looks to be raised metal inside of the line - also I noticed it is outlined on the sleeve, belt line and belly.
