I haven't tried this but we did notice in our multiplayer game that I was hosting that if another player took out a paint gun we all crashed. so we don't use them. I wasn't sure if it was just cleints using them or if I would crash too. I know with conveyor lifts I can use fine since I am hosting but everyone else crashes when trying to use.
we just don't use paint guns to work around it. but it make me wonder now if it is just tie to the mouse wheel selection.