Shoot, I was hoping there was like a contact lens or a pair of glasses or something. I am not into illegal gimmick or things that have a good chance of messing me up.
Do you meaning going from Hulk to Avatar? lolYeah, like wearing a hoodie walk up to some one. They will think you are the opposite skin color than you are. Then you do some stuff and BAM you are now a different skin color. And you can take off your jacket and what not.
I would say that it doesn't currently exist. I hesitate to discourage anyone from finding supposedly impossible methods.
That's what magicians do - impossible things. I just have no way to safely suggest any possible methods.
It's not revealing if the trick doesn't exist yet.
There was a trick on the market years ago called Tattoo Joe, where you could make a tattoo "appear" on your arm. I wasn't too keen on it from the videos but you might want to look into that.
Most magicians know what that it is so it's okay if you name it but most people abbreviate it as a TT.I wasn't naming a trick, I was naming a utility.