Running barefoot has been such a challenge to me! But a very enjoyable and rewarding one.
I've been thinking about why my feet still suffer from abrasions while running. Something in my form is still not right. I've narrowed it down to two things: 1) I'm still trying to place my feet too far in front of my body; 2) I am allowing my trailing foot to remain on the ground too long.
I just checked out Nicholas Romanov's POSE running site and learned that he recommends a quick lift of the trailing foot, getting it off the ground immediately! I have definitely been letting mine trail behind me too much, probably causing a "pulling-forward" scuff. I have also felt that I allow my legs to go too straight, probably connected with leaving my feet against the ground too long. If I keep my knee bent and pull my foot upwards immediately after each step, I should (hopefully) be able to eliminate the abrasions I have been suffering.
My heel pads and the pads over the outside edge of my feet have built up very nicely and are quite strong. But I cannot seem to develop similar pads over the balls of my feet because of the abrasion problems. I hope by employing faster foot lifting to reduce abrasions and then build up more padding on the balls of my feet.