I took a 2 day canoe trip down the James River (fresh water) and carried my leatherman wave in a nylon pouch. I went swimming for 30 minutes while it was on my waist (I forgot I was wearing it). After the swim, it took eight hours to get to camp, pulled out my wave and to my surprise there was rust on the pliers, particularly in the grooves of the mouth. I have had this wave for at least 3 years, and have had no surface rust issues. Should my wave rust after such time? How should I remove the rust?