So I have read through multiple questions about how the workshop handles the various categories when it automatically scraps things to produce raw materials for projects that you are building. It has been clearly shown that anything outside of the "junk" category is safe from automatic salvage.
However, I wanted to know what happens to things in the "junk" category when they are salvaged. If something from junk gets automatically dismantled to supply some material for a project, but the project only requires one of the several pieces of material from that broken down junk, do you still get the left-over materials or are those used up as well? I know that if you manually break down junk items yourself (i.e. drop them on the ground and use the settlement interface to break them down) then all of the materials are stored in your workbench, but what happens to those materials when the pieces are broken down automatically?