Here as a link to YouTube where an F250 aluminum body was in a wreck. Pretty interesting. It also stated that GM will be going to aluminum in 2019. Big Truck Big RV
I've got a 15 with steel tray still gets dents in it from way les force than he is swinging that pair of pliers, I have also used to rip high tensile steel sheet by hand after making a small cut to start not hard at all. Frank.