Use a hair drier to heat up the emblem for about a minute or so then use some 10lb fishing line behind the emblem and it will come right off , then use some WD40 or goo gone to get off the rest of the adhesive and then wipe down with some alcohol and your ready to install a new emblem, I installed 4.6 emblems and if you line them up right you can't see the locating holes, good luck
I'm going to use that WD40 tip. The guy who owned the car before me had a Skull and crossbone stick on the back window. (I scraped that sucker off with a Razor...) But the adhesive is still there. Never even thought to try it. But, that stuff is coming off tonight!
i believe i saw my dad use gas once (maybe WD-40????). Not really to sure but apply the gas and use dental floss to pull off the badging. it worked fairly well when my dad it around 5-6 years. (thats why i dont remember what he used)