Found a winter-time project that I can do for A) no money and B) without using the wife's side of the garage.

I just use a sharp chisel, a good hammer, and the cold weather. It began as just clearing out around the light rust spots around the old drain plugs, and then I remembered the Sport Compact Car article where they shaved something like 150lbs off a Civic. So I just kept on chiselling! I'm saving the chippings, and once I'm done I'll post the weight savings.