I read a thread that someone wanted to harden his knuckles for fighting, had an issue to deal with or something.
reminded me of a fighting style that makes hard knuckles and even gloves obsolete - didn't want to post in the old thread .. so here are a few links that may be of interest to anyone interested in the martial disciplines ..
http://www.systemaspetsnaz.com/No_Co...at_DVD_ru.html
Theres also a whole lot of related material that will be found on these pages ..