Furthur:
Most shoes will not HOld up to scraping your foot on the ground.. I used to play tennis and the older new balances had rubber on most of the front part of the shoe for that purpose, but i doubt it would hold up on Textured concrete..

One Solution:
We used to use a solution on our HOckey Skates that you applied like head cement on to the toe of your hockey skates.. It would Make a Hard Plastic Shell over the area you painted. YOu could try to do that to the parts of your shoe that are affected.. I guess it could work.

-Scott Lewis