Re: Thinking about buying a mig-welder...
When we say argon we are referring to cover gas in general. For steel I like 80% argon with 20% co2, 100% argon is used with aluminun. If welding aluminum you will need a puller handle added to the welder to help the wire flow through the hose to the handle without kinking the more flexable wire.
Your results may not be the same,Greg