Im looking at buying a welder. Im not sure if I should spend the extra cash on one that can use sheilding wire? Im looking a several diffrent welders, the one im leaning towards is a holbart ez125 welder! anyone have any suggestion? Input needed!
And yes, you can weld exhaust with flux core. It will only look like crap if you are inexperienced. You can also weld stainless to regular aluminized pipe with regular old .035 flux core wire....I have done it many, many times.
I use a Clarke 130en at home: http://www.antonline.com/p_WE6523-GP_331058.htm. So far it has been an awesome little machine. I've had the el cheapo Lincolns from Home Depot in the past. The only thing they are good for is hitting the duty cycle in the middle of a 2" long bead on 1/4" plate....then it's wait 10 minutes for the machine to reset. I have yet to hit the duty cycle on my Clarke and I've put it through it's paces on everything from 24 ga sheet metal to 3/8" plate. It is very similar to the big 220 Miller that I use at work. I think that it might even be made by Miller.
one of the biggest factor you should look at it is. the thickness of the metal it can weld and the duty cycle. The higher the percentage the better. Easiest way to understand duty cycle is if it says duty cycle say 20% that means it will weld at the the heat it is set at for 2 out of 10 mins.