I saw it in the early 90s. I remember a scene where a man was hiding in a closet with white doors with air gaps. When the man stepped out of the closet, he had his pointing finger made out of metal with a hole. This metal finger was a gun.
Another scene from this movie is where some kind of ship is being shrinked (by 1000 times) and entered some pink/orange tunnels (maybe a human body..).