Generally panel welding is done with MIG using .025-.030 wire. A lot depepends on the machine's capabilities. Also, it depends on the person's personal preferences. I have flux core capability with my welder, I have never used it, I have understood it was used for repairs in windy areas where wind would disrupt the gas shielding of MIG. I also understand it does not give the quality of welds compared to MIG. If you have the opportunity to try out both processes on some scrap metal comparable to the body panels, do so, and form your own opinions.
69 Post<br />(2 Dr. Sedan)<br />2nd Owners since 1975 (Came equipped with a Wife)<br />396, 4 speed<br />Project took 16 years... and 2 Kids later.....Finally back on the road...<br />EVEN managed to keep the original Wife for 26 years !!!!(so far)