I was wondering about this too. At one point I wanted too remove my hood bird as i kind screwed iotr up in a couple places. But decided it wasn't worth screwing up my perfect paint. I'm interested to see iff others have had successfully removed them before..
I had luck with Mineral Spirits. Get an edge stated and spray a little where you lifted the decal off the paint. Some heat from a hair dryer will help. Start on the low setting first. Medium should to the trick. No razor blade. Plastic scraper as mentioned should help it along nicely.