I thought that 'Ali clip' was the waste punchings from a automatic press punch.
Like where someones made a Ali electrical box & they have used a press punch to punch out holes for the cables to enter the box.
So I looked here http://www.commercialmetals.co.nz/ma...rap+Metal.html
& found its actually flat Ali sheet, probably off cuts from the industry.
The story with Ali turnings is.
Even though it new & clean, its a mixed grade & has a large surface area (the turnings are curved with a real rough side on one side) & is most probably covered with a thin layer of cutting fluid (Water containing oil & detergent).
It also takes up a lot of room.
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