I'm wondering what type of electrodes to use when welding alum. thin sheets (.040-.0620) and detail welds on larger blocks (mold repair) of aluminum. I'm looking at .04 and 1/16 sizes, but should I get pure or ceriated? We use ceriated at work, but only down to 3/32. I want to get some gas lenses (and collets, etc) for our miller aerowave at work. Managment doesn't want to spring for these, so I'm getting a set for myself.