Looking to install a set of rock sliders on my Renegade Trailhawk. I'll be putting brass nutzerts into holes in the body... what is the best way to prevent rust with these? I have to enlarge the factory holes and after that, I'll paint of course. I was thinking about using fluid film around them. Is there any other longer lasting treatments for where the nutzert touches the body? Annually I'll take the bolts out and spray inside with fluid film, as well as spraying the visible part of the nutzert. Open to any ideas, thanks!