Okay, I’m confused, I can’t fathom why you would need metal rails if you are using batteries? Anyway, I would strongly recommend against removing metal from the rails. It’s basically folded and crimped around the plastic, as I’ve pointed out in the picture below, it would not be easy to reattach and if you did it would not have quite the same affect. RC/Power Functions trains will run on anything, including the floor, because the battery is going to turn the wheels to matter what, I’ve seen people make troughs out of wood to run PF trains on.