I've had the carbon steel mora for maybe a few months now, it's my first fixed blade knife so I wanted to experiment and see what worked and what didn't, leaving it pretty beat up. I put a vinegar and mustard patina on it after the first two months up the blade, and I sanded off any rust and patina that didn't set right off. The problem I have with it now is that I can see a little bit of rust near the injection-molded plastic where the blade ends and the handle starts. I can't sand it off without damaging the handle, and I don't want to risk using CLR and ruining the plastic. Does anyone have experience with this?