I'm not sure what you mean by "fishin gut," but to de-badge mine, I just used a blow dryer to heat up the glue, and a wedged a piece of floss behind the badge and essentially cut the glue. I have a 2010 Aveo, and the back badge had two prongs on the back of it that attach to two holes in the back of the car. So eventually I had to pry it off since the floss won't cut through the prongs - nor would I want it to.
Fishin gut is fishin line. Ok so u dnt still have to remove ur bumper infront to gt the badge off? Is it easy to put both back on mst u put glue on agen?