The emblems are held on by two-sided tape. You can take a credit card, decal spreader, fishing line, or dental floss and use them to get behind the emblem.
In our shop, we use a spatula looking piece of plastic that goes on a air chiesel.
Anyway, you can use WD-40 or goo be gone or the like to remove the glue residue.
Or you can stop at my bodyshop and I'll remove tehm for free.
Mark