Well this way works and it wont hurt your paint. Use some fishing line and were some gloves, wrap the fishing line around your 2 pointer fingers and put it at the edge of your emblem, then slide it back and forth till it cuts through the 2side tape, if the fishing line breaks rewrap around fingers and keep doing it. Then once you get the emblem off, clean off the 2side tape thats still on the emblem. Then get some new 2side sticky tape from a autopart store. Then put it back on.
This is what i had to do when taking off my emblems, but i didnt put any emblems back on.
If you have any question just ask.