This will show you how to cover an old table with copper sheeting. I used a sheet metal brake (en.wikipedia.org/wiki/Brake_%28sheet_metal_bending%29
) and while it helps make nice corners it's not necessary. These instructions assume that you can cover the table with one sheet of copper; i.e. there are no seams.
If you are interested in this see the page with the discussion on the copper aging over time.