There is a Beast/Wonder Man one-shot Avengers issue.
There is Star Wars, where I believe he first begins to screw around with this.
There is the Detective Comics #500 Batman/Deadman team-up.
And I know there’s more I’m missing, but I really love Infantino’s “psychedelic” work. Was it him colouring himself? Was it him pairing himself, or being paired, with a particular colourist or colourists? This, too, was a style that might have caught on, but somehow didn’t…explanations? Examples? Disputations?
Wouldn’t you just freak out to see him do that on, say, a Silver Surfer comic?