Flamethrowing Jack-O'-Lantern

Step 7 Bend

Make a mark about 6" from one of the edges of the aluminum extrusion.

Line up this mark with the edge of the workbench and clamp it between the workbench and something stiff and flat like a 2x4 or metal bar.

Grab the protruding edge firmly and push down until it is bent to 90 degrees. In doing so, you may want to push it slightly past 90 degrees as the aluminum tends to spring back a little when done.