Here is one previous discussion about decals.
One here.
I replace my decals on the front and rear caps. Started with a heat gun and plastic scraper that worked fairly well on some. But on the front decals that were really cracked I found that a 3M Eraser wheel worked better. Not only removed the decal but a lot of the adhesive at the same time. Bought a quart can of 3M Adhesive Remover from O'Reilly's to remove the rest.
How mine looked.