For a typical break-in, and occasional throat maintenance, Tubbs FF does just what it claims.
It does NOT wear out your barrel(unless you shot a ton of them).
It's purpose is also NOT to 'polish' a bore. You would never want to polish a bore, as copper fouling would go out of control instantly. It's action is of relatively coarse lapping of the lands left ugly from chambering, and again getting ugly with retreat. It also reduces copper fouling overall(this is what people tend to notice & approve).
I've used FF/TMS with every barrel since it come out, and have had nothing but great results.