Holes, chips and scratches in a bearing surface don't necessarily cause problems until they become extensive enough to compromise the area that comes into contact with the shaft. They just make good reservoirs for oil. As long as the shaft is smooth and there's enough contact area to carry the load of the shaft, the oil clearance is much more important than having a completely smooth bearing. If the bearing is generally in good shape, just chamfer the edges of a pit or flaw so there's no jagged edges to keep deteriorating the soft metal. Bearing scraping and clearance-setting is becoming a lost art due to the universal use of precision-fitted bearings in the past 75 years or so.
Jerry
