So Cromartie's head goes through time just fine. the exposed metal flies through, no problem.
Cameron's body, coated in synthetic flesh, goes through just fine, up until the end when it is beaten up and missing the chip and it doesn't go.
Then there's the T-1000 thing: they are liquid metal, but as long as they "look" naked, they can go through?
I mean, Weaver had to morph clothesless and form new clothes in the future in order to get through? Isn't she made of the same stuff one way or another? Naked or clothed?
I keep hearing Christian Bale in the back of my head yelling, "What the ---- don't you understand!?!" I just cannot come up with an answer here.