Basically I want to make all weight painting for a single bone gone on a certain part of the mesh, because moving the arm makes the head mode slightly. I wanted to remove ALL of the paint, so I was wondering if I can do something similar to in edit mode where you go into wire frame mode and box select?
Yes, you can do that in weight paint mode:
- Select the bone
- Activate 'vertex selection masking' (or face selection masking with the button next to the left)
- Now you can select vertices like in edit mode, using A or box selection or circle selection
- Also you can use (if you need) Z to select behind/non visible parts (like toggling mesh/solid in edit mode, or like enabling/disabling 'limit selection to visible')