Mig Welder

gas will give cleaner welds, easier to weld thin sheetmetal with the .023, I just finshed lower qtr patches among others with .030 flux wire, It cleaned it up good and i treated welds with ospho, all came out great, BUT I was doing this OUTSIDE in the breeze! ha yes you will like using the .023 and gas way better.
not a pro but have welded for 50 years.