I found this fine picture of welders at work on http://www.artdecocollection.com/
Isn't it lovely? It is by Henri Quittelier who died in 1980 at the age of 96, having painted all his life. He was a pupil of Emile Fabry at the Academie des Beaus Arts Brussels, and later became co-founder and president of the Ukkel Art Center in Belgium.
Welding can be art too!