battery acid resistant paint

[1-PU70]

Im installing a new battery tray in my 70 and was wondering if there is some kind of paint or a coating I can brush on to protect it from battery acid. I would also coat or paint the inner fender and the core support in the area that is usually affected by battery acid. I have tried the battery mat but it didnt help much. I could just paint it and hope it lasts another 40 years but I want to sleep at night and not have to worry about what the battery is doing to my truck.