They make a brass/copper tool that you use for patching small holes in sheet metal, you should try a welding supply store. It has a handle and the other end is a flat paddle made of copper or brass, the weld won't stick to it.
that would have been a bad idea, what you used is the best way to cut body panels. I always lay down a piece of 3m painters tape to give me a straight edge to cut on.That looks kickass i cant wate to see the finished product.:D
Haha...yeah it will bleed itself out just make sure you have full charge on your battery and a good starter because the only way to turn that mech pump is by turning the engine.