Learn how to remove rust from metal so that it doesn't reappear. ... Spray removers greatly reduce the grunt work, but they require several applications and some ...

Most simple rust removers contain phosphoric acid, which dissolves flaky or granular rust, but does not seriously attack the parent steel. In fact it leaves a fine coating of iron phosphate which is a slight protective, and provides a good substrate for paint.

Scrub off as much of the flaky scale rust as possible - for this just wastefuly consumes the rust remover.

Low pH. Most rust removers are acids, of varying strength.

Gamma butyrolactone is a chemical used in some powerful removers. These removers include some stain removers, super glue removers, paint strippers and some solvents.