My military gear got all wet?

well i collect military gear and i am proud of it. well i own a navy seal tent and i threw it up and left my stuff in there it rained at my house. the tent is waterproof but water got in and screwed everything up all my stuff got wet. some got mold on it all the metal stuff that was in there got rusted. i cleaned it out took the tent down put everything out to dry and well i dont know what to do how do i go about cleaning all my stuff. and another thing i think some thing or somebody went in there and did it becasue something is missing and there is white stuff that looks like paint in the back that was under neath one of my back packs. i just dont know how i am going to go about cleaning this the stuff that has mold on it can i clean that off will the horrible smell ever go away and one of my dummy hand granades got all rusted and now there is rust on the floor of my tent! its just i am 15 and i dont know what i can do i am broke and every cent that i get goes towards other stuff so should i try to save up and replace some of the gear or should i try to clean it. the expensive stuff like my kevlar helmet gas mask didnt get that wet my gas mask had no water on it. but my intercepter body armor got soaked and now has small white dots on it just wat should i do.