Abstract: A rust stain removal formula using fluoboric acid as the active ingredient and a method of making same. The inventive formula does not etch glazed, glass or enamel surfaces to which the formula is applied. Further, the inventive formula reduces other problems caused by the hydrofluoric acid used as the active ingredient in prior art rust stain removal formulas. The formula is initially formed by adding ammonium bifluoride, and then boric acid to a solution of heated water. Oxalic acid is then added. The ammonium bifluoride reacts with the boric acid to form fluoboric acid. Optional ingredients such as a thickener and perfume may also be included in the inventive rust stain removal formula.