You can mig weld aluminum.
Here is a picture of a show host with a little welding training,
but the settings are from the guy who does the job every day.
It is the front bumper weld on the Corvette Z06 (we make this in one of our plants)
This is a screen dump from teh show called "Ultimate Factories"
We mig smaller connections, but the longer connections are laser welded.
