So... I've been running with Luna sandals for a while, but it's so nice in Florida for much of the year that I want to go barefoot. But the pavement wears down the soles of my feet after about 2 miles and my feet get sore. How do you "toughen" up your soles to the point where you can walk or run barefoot for several miles on pavement? I assume you just get outside more and walk around barefoot? But at the end of the day, would putting lotion on your feet after a shower help or hurt this process? How long did it take you before your feet were tough enough to run 26 miles on pavement?