I just wipe my Pro Hunters down with a light coat of oil and they go in the safe. No signs of rust. I did see the orange rust you are talking about after I hunted in the rain with my blued Pro Hunter. The inside of the frame was filthy from shooting Pyrodex and Triple 7. I tore it apart and cleaned it up and no orange spots anymore, but I shoot BH209 pretty much exclusively out of it and my SS Pro Hunter now.