That would annoy me too but I would say a "mirror" finish doesn't necessarily mean the surface in question has low stiction or is especially uniform and can in actuality increases friction as the surface is not ideal for the retention of lubrication. If minimal friction is the required trait then there are pretty much two processes to achieve that and polishing is not one of them. They are, Isotropic Superfinishing (also known as the “REM process”) which is a chemically accelerated surface finishing and WPC Treatment (Wonder Process Craft) which is a Fine Particle Peening and improves slide-ability and fatigue strength. These two have a very different visual surface finishes but both lead to greatly reduced friction.Reminds me of the time I had a Yamaha service center replace some fork seals in my bike. Mind you these forks had Traxxion dynamics AK 20 cartridges and the forks were polished on a lath for 0 stiction.
I got them back and the forks were all rough up with I don’t know what they used, but they said they do that to knock down any imperfection’s on legs that might compromise the new seals. My mirror finished fork legs were absolute toast !
I was Fucking livid !!!
Bike tech was an absolute Moron not to notice the mirror finished fork legs and think to himself I think I will dull this up a bit.
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