This is a sample for a current railing job I'm working on.
Years ago I fantasized that this 1" x 2" rectangular tubing might indeed collapse the way you see in this image ,if brought to heat in the forge and pulled around a scroll jig.My reasoning was based on the assumption that,all things being equal and the heat even throughout,there would still remain some structural integrity at the corners of the tubing that would hold the rectangular cross section while the broad flat faces all collapse in and the edge faces bulge out. This gives a lovely ,almost ORGANIC aesthetic to the scroll which is quite tactile and simply begs to be gripped.