A micropolish is ok on a good crank since the material removal is around .00001-2". This is for a good non-scarred crank. A scarred crank from a spun bearings requires alot more material removal is basically junk in my opinion.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.