On my trapsin mainhand I have um socket, so I occasionally like to try df bleed druids/barbs/bowslot/sorc

One thing I noticed tho, and this is my questions, is Bone armor on Necros. So far what I've seen from duels, if BA isn't complete (like 1 or 2 parts of it is destroyed) I can land a bleed on him. Never noticed full 3 armor parts BA necro getting bled. So my question is can DF actually apply blead through the full BA or it needs to be damaged/destroyed.

Open wounds and bone armor do not interact with one another.

Open wounds can and will be applied whether or not bone armor is up or down