I agree with Stan. And knowing what we have learned about ultrasonic cleaning bringing out hidden case colors, I won't be using steel wool or Frontier pads on actions and locks until I am certain that there are no case colors to remove or degrade.

As far as the thought that steel wool is softer than case hardening, so it cannot damage that hardened surface, consider this... high speed steel taps and drill bits become dull when used enough on mild steel.

A true sign of mental illness is any gun owner who would vote for an Anti-Gunner like Joe Biden.