I used some texture coordinate manipulation in order to get a sort of flow effect in the textures. Its not entirely accurate, and its very limited, but its a step closer to a procedural erosion technique/weathering option. Currently I am just blurring the noise texture downwards along the face normal. Here is the node setup and example photo:
Any help or tricks for this would be very appreciated. I am currently stuck on how I could get this to only come from the edge of an object…