I got my new hood and fuel door emblems from Eklers, 10 years ago, and they still look like new.
I would modify Marty's procedure for removing the old emblems by saying to use a combination of
3M Adhesive remover in conjunction with a
HAIR DRYER instead of a heat gun (which may be too hot...just saying.
Instead of a metal putty knife (or the like), I used a piece of mono filament fishing line stretched between my thumbs to "saw" my way through the adhesive (after the 3M and the hair dryer had done their work)
Also, I found by stretching a piece of masking tape over the speed nuts - especially the ones in the hood - and forcing the hex nut driver onto them, tape and all, the nuts would stay with the nut driver and not be so likely to fall off and get lost down inside the recesses of the hood.