Use fishing line or dental floss to run behind the emblem in an up and down sawing motion to remove the emblem. Once the emblem is removed use a heat gun to soften the leftover residue, then spray it with WD-40 or GooGone(available at Wal-Mart near paint supplies) let it soak. Then remove the remaining residue with a rag. You may have to repeat this process several times and you can use a plastic putty knife or spatula to help get the hard stuff off.
Do NOT use a razor blade! (Ask me how I know
I would recommend not using decal remover either. Some will remove paint (again, ask me how I know
) and once you spray it on it's too late to turn back if your paint starts to peel or bubble.