Ok. Another thought has crossed my congested grey matter:
I refuse to spend $4K for a fairly simple machine when I could easily construct it for $5k.
I am now thinking about utilizing a stainless, rotary brush or two. I am just now digging into it (cost and complexity), but I am thinking of setting up a tunnel arrangement with a powered conveyor or traction roller feed and "brushing" two surfaces of the rectangular tubing per pass.
This thread needs a bit more enthusiasm, guys......
Any other thoughts?
Scott