Working with what I have (basic stick welder), I am thinking about tackling my rusty rear quarter panels. One side has rust 1/2 to 1 1/2 inches along the wheel arch and into the dog leg. The other side is less bad. I know how to cut and prep for rust, but am less certain about my stick welding skills on 18-20 gauge sheet metal. I am inclined to work with something like 1/16 rods. What is your experience here? What kind of sticks and amps? Have people had luck with butt welds? Should I flange the existing sheet metal, drill holes in the donor pieces and tack? Stitch?