Revert Prefab property override through script

Hi Guys,

I have a situation where materials leaked into the scene due to something I did. But all those materials are in a prefab. Now I want to write an editor script that will find all the materials instances in MeshRenderer.sharedMaterials array in each mesh in the prefab and revert only that particular array element. I tried PrefabUtility.RevertPropertyOverride since I cannot revert the whole object or component or even the entire sharedMaterials array. Only the elements with material instances in it. The problem with PrefabUtility.RevertPropertyOverride is that it takes a SerializedProperty and I'm unable to get the SerializedProperty of the sharedMaterials array or individual elements in it because its a property and not a variable.

Any help would be really appreciated!

Thanks