As far as I know, there is nothing stopping you from using flux core wire in that machine. However, bear in mind that welding with flux wire is messy and will not produce welds as strong as GMAW. If you're just doing light work like making hardy tools and such, you won't have a problem aside from cleaning up the messy flux splatter. As with most any welding, the cleaner the steel, the better the weld. Moral of the story... as long as you're not building a car frame or something else your life might depend on, flux will work. Have fun cleaning the mess.