Joe Morin from Titan alloy is talking about welding aluminum.  He is doing a tutorial on how to fix aluminum.  He shows a new product called Nova, which is an electrode for cleaning dirty aluminum.  He shows two aluminum plates that are joined together for demonstration purposes.  He takes the Nova rod and shows how he can weld the two pieces together.  He begins welding the two plates of aluminum.  Then he hits the plates with a hammer and scrubs off the dust.  He shows the back side of the plates and how it is welded together.