Any welders on the board?

The flux core will actually work ok doing frame connectors and such. Clean up with a wire wheel will make it look almost as nice as mig. You can also but some stuff called anti-spatter that can be sprayed on to keep the spatter form sticking.
The down fall to the flux core is it's size. The smallest is .035 which is too large for doing sheetmetal. All you will do it burn through.