i have a triple k gun belt, it has a brass buckle and snaps that let you replace the buckle. i was going over my holsters and belt today and around the outside snaps was a green color just around the edges of the snaps. it was on the outside snap nothing on the inside one. what could this be? i took a toothpick and got it off the best i could. the belt has not been wet, i waxed it a while back and thats all i've done. thanks