Stop in for a cup of coffee

Bills65Dart said

Huh ? Corroless Red Oxide Primer (Rust Killer) is made for using on rust, and is a regular primer to use under regular paint, for example like semi gloss black. It is not a fluid film replacement. Would for example be excellent inside the car, on the floor pans, or in the trunk, before painting the car.

Bill

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You can’t spray it over rust and have it protect, it just reacts with the top layer. You have to remove the majority of the rust first for it to work. It won’t neutralize rust very far down, it is a paint that just sits on top and can’t penetrate very deeply.

Fluid-film can be sprayed over rust and will inhibit any further corrosion because it is in an oil carrier that penetrates deeply carrying the lanolin wax into the pores of the corrosion and creates an oxygen and moisture barrier that shuts down the corrosion process.