[Dusk Blue Z]

An IR Camera measures heat. Maybe “right” after stamping a block you may see the heat from the impact, but after the metal reaches room temperature I think it will all look the same. I don’t think this will show prior stamps but if you get some good images please post them.
The reason you can see the delamination in composite structures is because of the moisture and its effect on heat. Ever wonder why the police helicopters don’t use the Flir cameras to look for dead bodies?
Mike