This tip came from HD Tech Tip #36 dated October 1993 for removing 90th Anniversary tank emblems.
But the process may work for many other applications.

• Apply 3M general purpose adhesive remover to surrounding foam and adhesive backing. Allow to soak.
• Carefully apply heat directly onto the 3-D nameplate with hair dryer or heat gun.
• Avoid excess heat which will damage the painted surface underneath.
• Using plastic, wood or a rubber tool, carefully pry between the fuel tank and the nameplate and lift the nameplate from the tank.
• The pulling and prying will damage and destroy the nameplate itself, but the heat will soften the foam adhesive enough to permit easier removal.
• All remaining adhesive can be removed using additional 3M remover.
• A slight back and forth motion directly on the foam will ball material up for easier removal.

• You can also use heavy dental floss after applying the adhesive remover to “saw” the emblem free of the tank. ¹⁾