I am a Zero Rust fan myself. I never had heard of it until I started reading all the post from these old truck experts here. I think I have been getting it for like 50$ a gallon and it if holds up as good as some folks say, i will feel it will be well worth it. I was thinking of creating some sort of spray bomb so I could coat the inside of my doors and places I can't spray this stuff with my paint gun. I may try some in a garden sprayer, no kidding, to reach down into the door of my truck. I am sure you know, or have heard this, but always wear a mask to protect you lungs and stuff. Something to protect you eyes too.
Best to ya..