As I said, there may be no good answer...except not wearing your shoes. Put them on the mantle with a spotlight on them. Because as long as a person is determined to bull ahead and actually wear his shoes, abrasion will happen. You can either obsess about it to the point that you change the whole nature..mechanical and visual...of what you spent your money on or you can accept the fact that shoes are your interface with the world and are gonna take a hit no matter what you do. And be glad it's not your feet.