I am using 2 inch square Al tubing (0.125 thickness) as part of a frame for an experimental fixture. Part of me wants to flycut it to remove some dings, and part of me wants to leave well enough alone. Knowing that I can always start over if the tubes (11 in long each) were to warp like mad, I might just try it.
What is your best guess? Would knocking the skin off of the tubing cause it to warp or twist a lot? Is there something else you would do to make a presentable finish? It is not terribly important. I can probably get to a sandblaster, though it is not as accessible as in the good old days. Something I can do in the comfort of my garage gets extra points.