" I bought a 70lb Everlast nylon bag and one side of it is hard as hell"
Yes...
Kick it out. It will make your shins hard as hell in turn.
Buy some good jow to get rid of the bruises.
... Or work them out with a baseball bat. When my shins hurt too bad from working the shin kicks on the bag, I use a heavy steel pipe to beat out the hard parts and continue working out.
"i would show them 8 hours of animal porn and beheadings in a single sitting then make them write a paper about italy." -GDA
"he said there were tons of mantids fornicating everywhere. While he was there, he was sending me photos of mantis porn regularly." - Gene Ching