So I decided on a pvp server to use a completely transparent skin. It didn't work though. But then I realized that I forgot to back up my original skin. It's no longer online on the Minecraft skindex. Any help?
You might try a site like Minecraft Skin Viewer, which appears to store previous skins (it says I have 1 skin in the database, suggesting it could have more than one although I've never changed my skin, it may also be like the Internet Archive, which takes snapshots of sites at random intervals, thus not capturing every change). A Google search may also get you a cached copy of your skin.