Stalinium is a real thing trust me.

[French Cat]

Turns out that a long 90mm on the Super Pershing turns the barrel of a IS-4M a tad bit yellow. The Stalinium was so strong it withstood 4 entire rounds only turning it about a light orange or dark yellow. I swear a giant metal slug would rip a barrel apart but it was a Russian tank so makes sense. Btw he was looking at me perfectly so it wasn't any weird angle or volumetric thing.