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Originally Posted by fyton2v
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You can use both , gas makes for cleaner looking welds no slag to clean up
easier to see the puddle the flux creates smoke .. not a big deal but it's there
flux cored wire has the big advantage of enable you to weld outdoors in any conditions also does better over paint and rust , that doesn't mean you don't need to clean it up :-)
If you are getting a MIG welder get one than can do both, you don't want to be stuck with flux alone, get the best you can afford as you will find more and more jobs to do.
The Clarke is the best deal I could find around, also the Harbor freight is not bad just limited by the output amperage, the Clarke is definitely a machine that is built to last and 130 amps are good for steel up to 1/4".
The wire feeding mechanism is very nice.
The holes are kind of small, you can try and fill them rather than cutting and welding a new piece of metal.
Grind them clean and if you can find a thick 3/16"- 1/4" copper plate or aluminum
use it to back up the holes and just fill them with short spot welds starting from the edge then grind them flush, the steel will not stick to the copper.
Another method is using a steel washer and a rivet, hold the steel washer with the rivet pulling against the backside of the hole, tack weld it , drop the rivet and finish it by spot welding... take your time or the steel will deform and end up looking like cacca
