So, if you intend to rust-proof some metal piping in a utility ... then paint the object. Oil paints take longer to dry than ...

Ferrous metals start to rust after only a few hours of exposure to air and water ... and might warp the metal. Unlike most acid-based rust removers, POR-15—short for Paint Over Rust—not ...

That way, there's no further rusting from the acid because the acid does attack the metal ... it in the water-based rust inhibitor to stop further rusting until you're ready to paint.