For glass I normally use a razor blade. That usually gets most of the sticky too though if there's a little left some laquer thinner on a rag gets rid of that. I do this every year on my town permit sticker in the front windshield of my daily driver.
For chrome or even paint, I normally use some heat like a hair dryer or heat gun and pick at it with my finger nails or a plastic spoon so I don't scratch anything.
Generally I've found the newer the sticker the easier they come off. The newer ones will normally peel of in one or a few pieces while older stickers are more fragil and will break into pieces easier. Depends on what material and grade of that material they are made from too.
For chrome or even paint, I normally use some heat like a hair dryer or heat gun and pick at it with my finger nails or a plastic spoon so I don't scratch anything.
Generally I've found the newer the sticker the easier they come off. The newer ones will normally peel of in one or a few pieces while older stickers are more fragil and will break into pieces easier. Depends on what material and grade of that material they are made from too.