What exactly is an English Wheel? How can I use one?
An English wheel is a tool for bending flat metal sheets into curved surfaces. (Thanks to @vini-i for a much better, succinct summary!) As for what you can do with one, it's probably about the same as what I can do with one which is "not much" at the moment. :) But here's a video of an expert. Note that this guy makes it look easy, but it's actually embarrassingly easy to really screw up a panel on an English wheel.