i'm new to carbon steel blades i.e. ranger rd-7 first and only one. i'm concerned about rust. obviously keeping blade clean and oiled but what about around the pommel. could moisture or sweat seep between handle and tang. how do i prevent this, also i see where some suggest intentionlly forming a patina on blade. will this help. if so whats the best way to do this. i know this is alot of questions but just want to care for knife properly from the beginning. thanks