well mine is white and has no rust at all. What I've been doing for the last 3-4 years is at least once a year take the battery out, clean any dirt out and leaves and re apply clear waxoyl all over the battery tray. then i refit the battery and re-apply down the sides.. so far it's remained perfect. Also get yourself under the dash and check for rust forming there, underneath the battery tray and around its seams. I think the key is keeping it clean and ensuring the batery isn't leaking and that water cannot be trapped.