RE: Cutting straight 90deg edges to make sheets
That's the method I was trying to remember skeeter - no sandpaper! The #11 carbon steel Swann-Morton scalpel blades and handle I got yesterday should cut like butter through two sheets at once. And now I can go ahead and cut the 1" sq tubing into 2" and 3" lengths to be filled with molten lead to serve as weights on my new 4'x7' 5/8" tempered glass bench top.