Mig welder

If the machine is capable of gas, look on the inside door at the instructions and make SURE the polarity is right for flux. If it's backwards for flux, all you will get is a spitfest and bubblegum. Flux polarity is one way, MIG is the opposite. You can make a good weld with flux welding if you are patient and take your time. Certainly, it's not as clean a weld, but you can do it. Nonetheless, MIG does produce a cleaner job.