SLOWING down the rust monster..........

Eastwood makes some rust preventative products. Call them and see what they recommend. I would not spray water in that trunk area because the water will slip into tiny areas and help the rusting process. I no longer wash my car with a hose because these old cars can rust quickly and water gets into tight places no matter what. I get a bucket of water and wipe my car down changing clean rags often. I wipe and dry as I go. Just my way of doing things to prevent rust. If you have a daily driver this would be hard to do, but a garage kept car with a cover and it works well.