Molasses and water rust remover converter

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Cleaning up a rusted cast iron BBQ burner with molasses and water.
Molasses mixed with water 1:10 ratio (by volume).
Rust in molasses/water reacts to form phosphoric acid (a common ingredient in off-the-shelf rust converters) right where it is needed.
Eco friendly and gentle.
Use cheap stock feed molasses.
Pressure washers can make the cleaning faster.
Takes time - up to a week in my experience for heavy rust (sub tropical zone).