If you are concerned about holster wear on a gun you are carrying for self defense, then that gun has ceased being a lifesaving tool and has become a fashion accessory.
Forget holster marks, what’s it going to look like after being thrown in an evidence locker for 30 years if you use it?
I totally understand it being precious to you and it having personal value over and above its worth. If that’s the case, maybe that 1911 is not the gun to carry.
Get a nice OWB leather rig for BBQs and infrequent range trips where you will practice drawing, and enjoy the 1911 worry free.
Then go spend $300 on a used soulless G19, buy an JMCK or Tenicor IWB rig, and carry with confidence.