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@TotalShanner
They come out a dull matt silver before polishing. A bit like the colour of old Shimano LX.
The logos are lazer etched and hard to get into the nooks and crannies. I used various small brushes and polishing heads with dremel for those bits.
A couple spoons of caustic soda crystals into a tupperware box with some water. Submerged the whole crank arm and within a minute you start to see the water discolour as the black anodising comes off. Use an old toothbrush to help it along.
I had to repeat the process a few times to get it all off as I was worried about leaving them in for too long.
Polishing part too long and boring to describe here.
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