picked up a clean, like new battery tray to replace my rusted out one or whats left of it. Anybody found a good coating, brush or spray on, that would be good to put on to keep it from rusting out? I've tried some spray undercoating type stuff in the past but it ended up sticking to the battery, didnt really work out like I wanted. Hopefully there are some better products on the market now that would work for this. Thanks