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Captain Gary's Black Phos is designed to resist and remove rust from iron-based surfaces. It is a rust-inhibitting coating, not a paint. Remove loose paint, rust scale, dirt, oil, grease, and other debris with a wire brush. When applied to rusted surfaces Black Phos causes iron oxide (rust) to chemically change into an inert hard substance that turns the metal black and safely dissolves rust.

Black Phos

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