I can understand the premise that the flexhone would be better for removing proud metal (toolmarks) rather than removing metal evenly to the depths of the pits.

However, I've used steel wool and products like chrome polish, the smooth surface becomes mirror-like while the pits are untouched.

I'd just like to have easier to clean bores and less concern about corrosion. Down here with the humidity, if the bores aren't chrome, you're constantly fighting rust in even slightly rough bores.