Oh yeah, I meant to way that my cylinder bore looked like that, too, at more than twice or maybe three times the hours. The out-of-roundness and taper were both less than 0.0005" (professionally measured by an engine machinist neighbor). I deglazed it with a dingleberry brush, and put it back together. Probably only 10 hours on the rebuild so far, but so far so good.
Problems cannot be solved at the same level of awareness that created them.