I am not trying to be funny, but i have never had a problem with tig on alunimum. i don't know if i recieved bad filler or what. I tig alot and cannot get the finished bead to be shiny, no matter the ac balance. this job has fought us the entire way. I am running a miller syncrowave 250, using 5356 rod 1/8'' , 1/4'' material. and about 20psi on the reg. oh and around 230amps sometimes around 214amps. everyone is differnt.