Use fishing line to work behind the badges. They will pop right off. Helps if it is a warm day/heated garage/whatever.
I did mine in direct sunlight on a 68 degree day. BRZ and Subaru came right off. Then I used 3M Adhesive Remover, applied gently with a soft automotive cloth. Rubbed it in for a few seconds, used fingers to roll off adhesive and then kept using the 3M stuff until it was clean. Then I got my car washed.
It's really clean.
Perrin 3" and some Rallyarmors here too. Need to update the picture sine I have new tail lights now too.