When I went to the Lincoln Motorsports Welding class (week long) they taught us sharp electrodes for inverter machines. I have a Lincoln Precision Tig 225 and use pointed electrodes for aluminum.
Yes, same with big blues.. The grey electrodes work well with any metal on inverters, I haven't touched red or greens since I sold my synchrowave.
Acetone is your best friend when welding aluminum, the more cleaning action you use, the less depth there is to the weld and the the less concentrated the bead is. I wipe everything down with acetone, and as others of said, stainless steel brushes, that
only get used with aluminum and nothing else. I even have a set of gloves that I use for specifically for aluminum. I got my Tig training in Japan, with a guy yelling
clean clean clean in my ear for 2 weeks..
Forget about that caustic stuff they sell in welding stores, doesn't work..
