The emblems can be removed with fishing line behind the badges. Use a gentle sawing motion when you do it and the line will cut its way through the adhesive tape holding the piece on.
You can use Goo Gone when you are done to remove the excess adhesive. Immediately wash the area with soap and water, then apply wax to treat the paint. Hope that helps.
Get a hair dryer or a heat gun to heat up the adhesive before trying to remove the emblems, it makes it a whole lot easier. Then get some solvent to get off the rest of the glue. After that use some compound and wax/polish to go over the area.