lighten up there buddy, seems to me in the first place that this thread's originator already answered all of his own questions via google.
i've had poor experiences with kohler engines, i'd never buy anything with one on them and there's alot of people on here that feel the same way.
as far as plating issues go lots of things can cause it. oil starvation, worn piston, rings, improper honing, dirt ingestion. kohler specifically states NOT to hone their cylinders. i've seen other engines be rebuilt with less than perfect cylinder coatings and run like a top for a long time