Parkerizing requires Maganese dioxide and phosphoric acid, plus a bit of iron (steel wool or filings) in boiling water. Would it be possible to use the manganese dioxide from a standard (non alkaline) dry cell? If I rinsed the mixture with water, the ammonium chloride, being soluable in water, should wash out. The manganese dioxide, being non-soluable in water, but soluable in acid, should remain???
Or alkaline battery - rinse out the sodium or potassium hydroxide(alkalie)?
What is another easy to get sourse for manganese dioxide????