Nevermind I just noticed when I salvage an item. The aspect automatically gets sent to the Codex of Power. Good idea by the way, cudos. When I try to trashcan this post, I get an error. So may need to fix that
You salvage them at the blacksmith now and then they are permanently added to your Aspects Codex to use as much as you’d like. Every time you salvage a higher version of the aspect, the higher/highest version is saved forever.