Hoping some wise heads here can offer some advice. I've made a few kydex sheaths, this about my sixth. Mostly they have been for rough use users and practicality comes before cosmetics. My question is how do I stop my kydex scratching my blades? I know its not the kydex but the little bits of grit that find there way in, but try as I might I cant get them out. I try to keep the shop clean when I'm working with kydex but shaping, sanding and finishing the edges of the sheath always leads to grit in there that just wont wipe, wash or blow out. I will try leaving more relief around the blade itself but was wondering if there was any tips you guys had for getting the grit out?