But look at his face when he is yelling those lines.
Nothing on his face.
Drake was immediately SCARRED and melted.
He didn't get as much acid on him as Drake. Also, the acid would take it's time to eat through his skin, which might be why the actual damage is not immediately visible.
The artist did paint in a little too much damage around his lower jaw and lips though. Same with the tip of his ear and left nostril.