Stu,
There is a very good reason that MIG, TIG, or even CO2 inert gas welders
are so popular. The inert gases prevent getting brittle crud in the
weld, which significantly affects strength and appearance.
In addition, you do not have to be so careful in applying the bead, as
the arc and rod are much finer, and much neater. Therefore the weld is
smaller and has less heat affected surrounding material that is weakened
or distorted from heat.
They can make fine, non brittle welds on joining sheet metal. Much
better control. CO2 is not the best, but is the cheapest gas, and works OK.
Ask some professional welders about your applications, and expected
amount of welding, and maybe they can steer you to an inert gas system
of the proper size, and price for your needs. Maybe even a used one that
is too light for their current professional needs, but just right for you.
It is also capable of welding aluminum, which can be very handy.
Look into it, before you decide.
Steve
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Steve Laifman
(http://www.TigersUnited.com/gallery/stevelaifman.asp)
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