I use a hand made knife made from an old nickelson file with a deer antler handle, that I made myself.Why a home made knife? Because I am a buckskinner!
It's more my range bag than possible bag, but I give her a few strokes every time at the range and it seems it's always sharp.
Lent it to my brother-in-law one day to cut a chunk of hose, told him it was sharp, went through that hose like butter. He said he was not used to a scraper that sharp. I've used his knife a few times, it's about like trying to cut something with a putty knife.