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Originally Posted by mpierich
BUT, as I finished up with my 320-grit, it became apparent that the surface I had been working on has an orangpeeled-lookng surface.
But, my question is, how could the orangepeel appear after I did all that with the greaseless to remove the heavy scratches?
I'm no metallugist but it almost seems as though the aluminum had areas of lesser and greater density; the greaseless took more out of the softer areas, hence leaving the orangepeel effect. Anybody else ever see this? If my theory is true, then if I had started with a flat sanding (belt or whatever) it probably would not have happened.
Any thoughts?
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hey mike do you know what the alloy was? if it was 2000 series aluminum bar it is real soft. i would guess that the greaseless got the surface hot and started to "smudge" or "smear" the surface . it probable was not visible due to the fact that the greaseless is not meant to shine but to cut. i would agree on the last point about flat sanding most likely would not have done that. but since i use a different kind of greaseless i cant say for sure.