The bugs can get insane out in my neck of the woods so we load on the off (yes... a pun). As temporary camo my friend put camo duct tape on his m16. By the end of the day the paint on the tape near his foregrip and stock had melted away (note : this was just rub off, no actual Off was sprayed onto the gun). My brother's USP spring also got a few tiny stray drops of deet on it, and no, it didn't eat the gun, but it definitely left marks.
You know you're using lots of deet when any exposed flesh starts to burn. Take that.... god damn bugs....
"To invent, you need a good imagination and a pile of junk." - Edison