Whether it's a stainless steel or mild steel welded metal figure sculpture I'm starting, it all begins with the armature. It's very helpful to have accurate anatomical measurements for the bone structure. It will look awkward if this is not done right.
I TIG weld the stainless, which is very finicky to get to weld. the steel gets oxyacetylene welded which is fairly easy but took allot of practice.
A blog on my sculpture and sculpting process.