I've used primarily Imaginisce papers/rub-ons plus some trims/buttons from my stash to alter these items.
I envision the paperclip being used as a photo or card holder.
Here's the front of the CD case.
And now the inside.
I hope these metal creations inspire you in some way and that you will play along at Little Red Wagon this week. Check out the rest of the team's creations, links to their blogs are in the left column.