Animate player color on key press?

Hi there. I’m trying to get my player character to change color in certain parts of his body while the shift key is held down on the keyboard. I followed a few tutorials on Matinee and managed to get this working on any object that is already on the stage but the problem is my player character is generated from the player start object and is not on the stage. Anything that points me in the right direction would be most appreciated. I’ll admit I’m a novice with unreal but I do have a very good grasp of node systems and 3D animation. Thanks in advance.