Ever hear the phrase, "blood, sweat & tears"? Suck it up baby and welcome to the club!! I have scabs on my shin that haven't healed in over 10 weeks cuz' I keep scraping over them!!
As mentioned, your form is good and your staying close and tight. They do make shin guards for DL's, not sure where to pick them up though. Also I have seen some competitors use tall tube socks, they prolly have the shin guards under them as well.