i'am the welder
I used .030 aluminum wire in the stock lincon electric 120v welder.
I was able to get a couple beads but the wire does not want to feed and it splashes.
lincon sells a kit to make it spool perfectly, it includes aluminum wire rollers and aluminum wire line sheath to go inside the gun cable to prevent the soft Al wire from binding.
you will also need 100% argon gas to weld Al