We got cricket with a good size cage, but her previous owner used corn cob litter on the bottom. I hate it, its messy and hard to clean so to newspaper she goes. But when i changed out her tray in the bottom, its extremely rusted. Can or should i do something about it? Can i just toss a coat of paint on it? She has no access to it, cant touch it or chew on it. I had also noticed the cage we got with our cag, the owners put a layer of wallpaper on the tray, easy to clean and solves the rust issue!