I have that problem with one of my Jimmy Choos. It is one of my favorites to put in rotation, so the scruffing is more prominent as compared to my other shoes. I have not done anything with them yet. You can try checking with a cobbler to see what they can do.
they can put rubber on the bottom of the soles or just the toe. I put rubber on all of my shoes because it makes them last longer. Arturo on little santa monica in BH is wonderful. For some reason I drew a blank and I cannot remember the name of his shop? Anyways it is 2 blocks west of rodeo on little santa monica on the north side of the street!!
Do you replece them when the shoes are still new? or when they are already worn out?
This happened to my CL Veee pumps but I have not done anything to them because I have not found a perfect cobbler. Its a shame on how hard it is to find one.