They make aluminum welding sticks with flux that work with DC welders.
You can't. you need a TIG welder to weld aluminum. It's an especially hot welder for aluminum specifically.
Impossible. You need a TIG welder with AC and high frequency. Although you CAN use solid wire MIG with 100% argon shield gas, this is not a job for amateurs. MIG welding aluminum requires professional-grade equipment and several years experience with welding.
