Bones can be not quite enough sometimes, and for my secret military organization, every possible advantage is given to the soldiers. Including reinforcing bones. But...where do I put the metal?
Handwavium Material X
Will not cause blood poisoning/other effects once in place
No ill effects during placement by nanites
At least as strong as steel
The material will be placed while the bones are shattered, so there is easy access to anywhere in/on the bones. Once the material is in place the soldier is given some Skele-Gro to fix the bones together in about five minutes. The metal as well as calluses(which remain thanks to a slight modification in the SkeleGro) make for very strong bones. In theory.
Assuming the material can be placed easily, where do I put Material X for maximum bone reinforcement? If it uses less that's great too, but I don't think it will be very easy to measure how much your method uses without actually trying it.
Below is just a bunch of information not in the original question from the comments I'm just putting here so everything is in the same spot.
Looking more for blunt force protection than bullet proof bones. If they can be tossed around and then get back up whereas most people would be waiting for an ambulance, that's more what I'm looking for.
Don't worry about ligaments, just bones at the moment.
Try to keep mostly bones rather than completely replace the bones. Keep at least a 50-50 bone-metal ratio. More bone is better.
Doesn't necessarily have to be metal, anything that strengthens will be acceptable.