I have a 'new' 84 Toyota Pickup (this truck has been stored almost all it's life and has never seen rain) I will be using the truck for general haulage, and wish to protect it's bed. I have been advised that Drop in liners can promote rust in wet environments, plus it may be hard to find one for what is now a 22 year oil truck. I'm therefor considering a Spray/Paint on liner. Anyone have recommendations?