Incase anyone wants to do this too. What you need to do is login to your character. Go into '/mmm'
and browse to 'Debug Menu > Design Testing > Character Change > Save Character To Common Folder' which then saves your character as a .TXT file in your client folder ':\\CoH\characters\common'. This file has all your characters information including badges, inventory and power information.
I was able to find the syntax of 'S_' and then went through the 'https://paragonwiki.com/wiki/Salvage' wiki and one by one added each Salvage, confirming each one in the list worked. You can also do '/rw invention all' which gives you 10 of each salvage item.