I've been warring with a pair of rusted-on rear license plate screws since Tuesday. This is Friday. I tried everything in my arsenal -- every screwdriver that was even close to the right size, WD-40, silicone spray, a screwdriver borrowed from a friend, even a screwdriver borrowed from the local AutoZone. The one from AutoZone was finally a tight fit in the slotted head, but resulted in halfway stripping one of the screws. It was to the point where I considered getting a friend to drill out the screws. (Or zapping them with my sonic screwdriver.) But I tried one last time. Another squirt of silicone spray, several taps on each screw and a couple hours' wait. And then, the last straw: A pair of combination pliers with teeth that might either wear down the edges of the screws or sink into them tight enough to provide some leverage. So into the cold garage I went, at about 8:45 p.m. No more daylight left, but I finally had the energy to give it a go. Setting the pliers