Yup, Mig will work just dandy, but make sure to use a wire wheel on a grinder to clean the paint off the frame before you begin, as a wire feed does not dig through paint and other stuff as easy as the old stick welders. As a note, I have also used a stick welder, but you have to be a very good welder to use a stick on such thin material. I've fixed some pretty ugly "welds" that were laid down by folks who "thought" they had the skills with a stick welder. To be safe, a wire feed is a snap.
Rick