Yes, the hands are gray and stickers were applied. A similar thing was supposed to be done with the biceps. It came in black with gray decals to cover it, but I chose to just paint it.
I watched it over the weekend with my wife and daughter. Such a waste of time. They should've kept it a series instead of a movie. It could've made more sense that way.
Did you paint it or applied the included stickers/ decals?
I'm still trying to understand why, if the set comes with black and gray pieces, there's a black part that needs to be covered with gray decals.