Mother's Mag polish can produce a wonderful looking mirror polished finish.
For example, a relatively small percentage of Ruger Old Army cap & ball revolvers came from the factory with what was called a "high polish" finish that looked like a mirror polished finish.
I know a person who could produce nearly the exact same Ruger factory "high polish" finish on his plain stainless Ruger Old Army's using Mother's Mag polish.
I couldn't tell the difference between his mirror polish and the factory "high polish".
The only real way to know if it were an original factory finish would be to contact Ruger to ask if it left the factory with the "high polish" finish or not.
Which I know that he did ask Ruger on one occasion and they confirmed that it had left the factory with the "high polish".
I'm not sure why my friend would polish all of his Old Army's other than he really liked the way that it looked and perhaps it helps to make cleaning easier.
The finish can also be waxed with car wax to help preserve the mirror polish and to further aid cleaning,
I've also seen a beautiful sidelock pistol having bright mirror polished steel that was produced using Mother's Mag.,
It was simply gorgeous.